[Research and Life | Curriculum Vitae | PDF version of the publication list]

My Research Biography in Brief and List of Publications

See also almost complete lists in ResearcherID by ISI Thomson , and in arXiv

At present I work on both graphene and on various aspects of HTSC. I became interested in planar graphite or graphene in 2003. I investigated magnetic oscillations (de Haas -- van Alphen effect, Shubnikov -- de Haas effect) and integer quantum Hall effect in this new fascinating material. This unconventional quantum Hall effect, and the predicted nonstandard features of the quantum magnetic oscillations have been observed in the most recent experiments [see Nature 438 (2005) 197 (2005); Nature 438 (2005) 201 ; Physics Today, 59 (2006) 21 ].

I gave an invited talk [ click here to see PDF file ] on the quantum Hall effect in graphene at the March 2006 Meeting of the American Physical Society, March 13-17, 2006 in Baltimore.

My work at McMaster University has started in 2005 with a very interesting collaboration with the experimental group of Prof. T. Timusk (paper), where my contribution was to develop an approximate formula (full derivation is given here) which they could easily use to fit the data.

The main direction of my early research was the modeling of the electronic properties of high-temperature superconductors (HTSC). In particular, I have been studying the important features of HTSC based on their low dimensionality, low carrier density and d-wave character of pairing. These common properties of HTSC materials make them essentially different from ordinary superconductors. For instance, a crossover from the superconductivity of the BCS type to the superfluidity of composite bosons occurs in the corresponding models as the carrier density decreases. My early work was devoted to the description of this crossover. These and related works formed the basis of my PhD (1996) thesis. In 1998 I was awarded the prize of the National Academy of Sciences of Ukraine for Young Scientists on the basis of these papers.

My subsequent articles in period 1997 - 2000 [see e.g. this] were devoted to the study of the formation of the superconducting state in the 2D and quasi-2D attractive Hubbard models that is believed may describe some features of HTSC. Using the modulus-phase variables appropriate to this problem I proved the presence of a new non-superconducting, but gapped phase in the 2D model of a superconductor with a relatively small carrier density. In particular, I obtained analytic expressions for Green's function [see JETP Letters 69 (1999) 141; JETP 90 (2000) 993 and Physica C 370 (2002) 239] and other observable quantities. I attempted to relate this phase to the pseudogap phenomenon observed in HTSC. The approach developed in my papers may be regarded as a microscopic derivation of the phenomenological theory of Emery and Kivelson [Nature 374 , 434 (1995)] that relates the pseudogap phenomenon to the fluctuations of the phase of order parameter. All these results are discussed in the review.

From 2001 I have concentrated on studying various consequences of the d-wave character of Cooper pairing in HTSC. I have derived a finite temperature time-dependent effective action for the phase of the pairing field devoting a special attention to the so called Landau damping terms. I have also investigated the Carlson-Goldman mode in clean d-wave superconductors using the effective ``phase only'' action formalism. In 2002 I have studied the dependence of the superfluid density in HTSC on an applied magnetic field (I came back to this problem recently) caused by Volovik effect and investigated the collective phase excitations ( Leggett mode) in two-band superconductors using the path integral formalism and applied these results to the recently discovered MgB2 superconductor.

Reviews

  1. V.M. Loktev, S.G. Sharapov.
    Superconducting condensate formation in metalic systems with arbitrary carrier density.
    cond-mat/9706285;
    Condensed Matter Physics, Lviv, No.11 (1997) 131-177.

  2. V.M. Loktev, R.M. Quick, S.G. Sharapov.
    Phase Fluctuations and Pseudogap Phenomena.
    cond-mat/0012082;
    Physics Reports 349 (2001) 1-123.

  3. L. Benfatto, S.G. Sharapov.
    Optical-conductivity sum rule in cuprates and unconventional charge density waves: a short review.
    cond-mat/0508695;
    Invited paper for a special issue of Low Temperature Physics dedicated to the 20th anniversary of HTSC.
    Low Temp. Phys. 32 (2006) 533-545.
    [Russian original: Fiz. Nizk. Temp. 32 (2006) 700-715.]

  4. V.P. Gusynin, S.G. Sharapov, J.P. Carbotte.
    AC conductivity of graphene: from tight-binding model to 2+1-dimensional quantum electrodynamics.
    arXiv:0706.3016;
    Invited review paper
    International Journal of Modern Physics B Vol. 21, No. 27 (2007) 4611 - 4658.

Refereed journals

  1. E.V. Gorbar, V.M. Loktev, S.G. Sharapov.
    On concentration behaviour of superconducting phase of bilayered cuprates.
    Superconductivity: physics, chemistry, technics. (1994) 1352-1358. (in Russian)

  2. E.V. Gorbar, V.M. Loktev, S.G. Sharapov.
    Electron spectrum and critical temperature of HTS materials with several cuprate layers in a cell.
    Soviet J. Low Temp. Phys. 21 (1995) 329-336.
    [Russian original: Fiz. Nizk. Temp. 21 (1995) 421-430.]

  3. E.V. Gorbar, S.V. Mashkevich, S.G. Sharapov.
    Anyonlike particles in three dimensions.
    cond-mat/9503160;
    Phys. Rev. B52 (1995) 16096-16100.

  4. E.V. Gorbar, V.M. Loktev, S.G. Sharapov.
    Crossover from BCS to Composite Boson (Local Pair) Superconductivity in Quasi-2D systems.
    cond-mat/9503004;
    Physica C 257 (1996) 355-359.

  5. S.G. Sharapov.
    On theory of superconductivity of quasi-2D fermi-systems.
    Ukrainian Phys. Journ. 41 (1996) 212-218. (in Ukrainian)

  6. V.M. Loktev, S.G. Sharapov.
    On theory of 2D superconductivity at arbitrary density of fermions and indirect interaction between them.
    Low Temp. Phys. 22 (1996) 211-215.
    [Russian original: Fiz. Nizk. Temp. 22 (1996) 271-276.]

  7. V.M. Loktev, V.M. Turkowski, S.G. Sharapov.
    Crossover from superfluidity to superconductivity in 2D systems at indirect interaction between carriers.
    Journal of Physical Studies No.3 (1997) 431-440. (in Ukrainian)

  8. V.P. Gusynin, V.M. Loktev, S.G. Sharapov.
    Phase diagram of 2D metal system with arbitrary carrier density.
    JETP Letters 65 (1997) 182-188.
    [Russian original: Pis'ma ZhETF 65 (1997) 170-175.]

  9. V.M. Loktev, S.G. Sharapov.
    Bose-fluctuations and paramagnetic susceptibility of 2D metal with attraction between carriers: spin gap?
    Low Temp. Phys. 23 (1997) 132-139.
    [Russian original: Fiz. Nizk. Temp. 23 (1997) 180-189.]

  10. V.P. Gusynin, V.M. Loktev, S.G. Sharapov.
    On peculiarities of superconducting state formation in 2D metallic systems.
    Low Temp. Phys. 23 (1997) 612-617.
    [Russian original: Fiz. Nizk. Temp. 23 (1997) 816-823.]

  11. V.P. Gusynin, V.M. Loktev, S.G. Sharapov.
    The behavior of the paramagnetic susceptibility of a 2D metal during transitions between normal, pseudogap, and superconducting phases.
    Low Temp. Phys. 23 (1997) 936-937.
    [Russian original: Fiz. Nizk. Temp. 23 (1997) 1247-1249.]

  12. V.M. Loktev, S.G. Sharapov, V.M. Turkowski.
    Phase diagram in 2D Frohlich model of metal at arbitrary carriers density: pseudogap versus doping.
    cond-mat/9703070;
    Physica C 296 (1998) 84-90.

  13. R.M. Quick, S.G. Sharapov.
    Persistence of pseudogap formation in quasi-2D systems with arbitrary carrier density.
    cond-mat/9708151;
    Physica C 301 (1998) 262-271.

  14. V.M. Loktev, V.M. Turkowski, S.G. Sharapov.
    Superconductivity in the Frohlich two-dimensional model with an arbitrary carrier concentration.
    Theor. Math. Phys. 115 (1998) 694-705.
    [Russian original: Teor. Mat. Fiz. 115 (1998) 419-436.]

  15. V.P. Gusynin, V.M. Loktev, S.G. Sharapov.
    Pseudogap phase formation in the crossover from Bose-Einstein condensation to BCS superconductivity.
    cond-mat/9709034;
    JETP 88 (1999) 685-695.
    [Russian original: ZhETF 115 (1999) 1243-1262.]

  16. V.P. Gusynin, V.M. Loktev, S.G. Sharapov.
    Green's function of a 2D Fermi-system undergoing a topological phase transition.
    JETP Letters 69 (1999) 141-147.
    [Russian original: Pis'ma ZhETF 69 (1999) 126-131.]

  17. V.M. Loktev, R.M. Quick, S.G. Sharapov.
    On a possible reason behind the anisotropy observed in the superconducting properties of underdoped cuprates. (Letter to the Editor)
    Low Temp. Phys. 25 (1999) 381-383.
    [Russian original: Fiz. Nizk. Temp. 25 (1999) 515-518.]

  18. V.M. Loktev, R.M. Quick, S.G. Sharapov.
    Superconducting Condensate Formation in Quasi-2D Systems with Arbitrary Carrier Density.
    cond-mat/9804026;
    Physica C 314 (1999) 233-246.

  19. R.M. Quick, S.G. Sharapov.
    The Coleman-Weinberg effective potential in the theory of superconductivity.
    cond-mat/9804310;
    Theor. Math. Phys. 122 (2000) 390-401.
    [Russian original: Teor. Mat. Fiz. 122 (2000) 468-481.]

  20. V.M. Loktev, R.M. Quick, S.G. Sharapov.
    Phase Fluctuations and Pseudogap Properties: Influence of Nonmagemetic Impurities.
    cond-mat/9904126;
    Low Temp. Phys. 26 (2000) 414-418.
    [Russian original: Fiz. Nizk. Temp. 26 (2000) 567-573.]

  21. V.P. Gusynin, V.M. Loktev, S.G. Sharapov.
    Phase Fluctuations and Single Fermion Spectral Density in 2D Systems with Attraction.
    cond-mat/9811207;
    JETP 90 (2000) 993-1009.
    [Russian original: ZhETF 117 (2000) 1143-1160.]

  22. V.M. Loktev, S.G. Sharapov.
    On the structureless shape of the optical absorption band in beta-oxygen cryocrystal.
    Low Temp. Phys. 26 (2000) 899-907.
    [Russian original: Fiz. Nizk. Temp. 26 (2000) 1214-1225.]

  23. S.G. Sharapov, H. Beck, V.M. Loktev.
    Finite Temperature Time-Dependent Effective Theory for the Phase Field in two-dimensional d-wave Neutral Superconductor.
    cond-mat/0012511;
    Phys. Rev. B 64 (2001) 134519.

  24. V.P. Gusynin, V.M. Loktev, R.M. Quick, S.G. Sharapov.
    Quantum Phase Fluctuations Responsible for Pseudogap.
    cond-mat/0007271;
    Physica C 370 (2002) 239-245.

  25. V.M. Loktev, S.G. Sharapov, H. Beck.
    Electron spectral function in orientationally disordered molecular cryocrystal.
    Low Temp. Phys. 28 (2002) 220-226.
    [Russian original: Fiz. Nizk. Temp. 28 (2002) 311-320.]

  26. S.G. Sharapov, H. Beck.
    Effective action approach and Carlson-Goldman mode in d-wave superconductors.
    cond-mat/0109004;
    Phys. Rev. B 65 (2002) 134516.

  27. S.G. Sharapov, V.P. Gusynin, H. Beck.
    Low temperature superfluid stiffness of d-wave superconductor in a magnetic field.
    cond-mat/0203100;
    Phys. Rev. B 66 (2002) 012515.

  28. S.G. Sharapov, V.P. Gusynin, H. Beck.
    Effective action approach to the Leggett's mode in two-band superconductors.
    cond-mat/0205131;
    Europhys. B30 (2002) 45-51.

  29. S.G. Sharapov, V.P. Gusynin, H. Beck.
    Transport properties in d-density wave state in external magnetic field: Wiedemann-Franz law.
    cond-mat/0211366;
    Phys. Rev. B 67 (2003) 144509.

  30. S.G. Sharapov, V.P. Gusynin, H. Beck.
    Magnetic oscillations in planar systems with the Dirac-like spectrum of quasiparticle excitations.
    cond-mat/0308216;
    Phys. Rev. B 69 (2004) 075104.

  31. L. Benfatto, S.G. Sharapov, H. Beck.
    Effect of orbital currents on the restricted optical sum rule.
    cond-mat/0305276;
    Europhys. B39 (2004) 469-473.

  32. L. Benfatto, S.G. Sharapov, N. Andrenacci, H. Beck.
    Ward identity and optical-conductivity sum rule in the d-density wave state.
    cond-mat/0407443;
    Phys. Rev. B 71 (2005) 104511.

  33. V.P. Gusynin, S.G. Sharapov.
    Magnetic oscillations in planar systems with the Dirac-like spectrum of quasiparticle excitations II: transport properties.
    cond-mat/0411381;
    Phys. Rev. B 71 (2005) 124124.

  34. V.P. Gusynin, S.G. Sharapov.
    Unconventional Integer Quantum Hall effect in graphene.
    cond-mat/0506575;
    Phys. Rev. Lett. 95 (2005) 146801.

  35. S.G. Sharapov, J.P. Carbotte.
    Effects of energy dependence in the quasiparticle density of states on far-infrared absorption in the pseudogap state.
    cond-mat/0505304;
    Phys. Rev. B 72 (2005) 134506.

  36. J. Hwang, J. Yang, T. Timusk, S.G. Sharapov, J.P. Carbotte, D.A. Bonn, Ruixing Liang, and W.N. Hardy.
    The a-axis optical conductivity of detwinned ortho-II YBa2Cu3O6.50.
    cond-mat/0505302;
    Phys. Rev. B 73 (2006) 014508.

  37. S.G. Sharapov, J.P. Carbotte.
    Superfluid density and competing orders in d-wave superconductors.
    cond-mat/0511349;
    Phys. Rev. B 73 (2006) 094519.

  38. V.P. Gusynin, S.G. Sharapov.
    Transport of Dirac quasiparticles in graphene: Hall and optical conductivities.
    cond-mat/0512157;
    Phys. Rev. B 73 (2006) 245411.

  39. V.P. Gusynin, S.G. Sharapov, J.P. Carbotte.
    Unusual Microwave Response of Dirac Quasiparticles in Graphene.
    cond-mat/0603267;
    Phys. Rev. Lett. 96 (2006) 256802.

  40. V.P. Gusynin, V.A. Miransky, S.G. Sharapov, I.A. Shovkovy.
    Excitonic gap, phase transition, and quantum Hall effect in graphene.
    cond-mat/0605348;
    Phys. Rev. B 74 (2006) 195429.

  41. V.P. Gusynin, S.G. Sharapov, J.P. Carbotte.
    Anomalous Absorption Line in the Magneto-Optical Response of Graphene.
    cond-mat/0607727;
    Phys. Rev. Lett. 98 (2007) 157402.

  42. V.P. Gusynin, S.G. Sharapov, J.P. Carbotte.
    Sum Rules for the Optical and Hall Conductivity in Graphene.
    cond-mat/0701053;
    Phys. Rev. B 75 (2007) 165407.

  43. V.P. Gusynin, S.G. Sharapov, J.P. Carbotte.
    Dirac Quasiparticles in the Magneto-Optical Response of Graphene.
    arXiv:0705.3783;
    J. Phys.: Condens. Matter 19 (2007) 026222.

  44. L. Benfatto, S.G. Sharapov, J.P.Carbotte.
    Robustness of the optical-conductivity sum rule in Bilayer Graphene.
    arXiv:0712.1885;
    Phys. Rev. B 77 (2008) 125422.

  45. V.P. Gusynin, V.A. Miransky, S.G. Sharapov, I.A. Shovkovy.
    Edge states, mass and spin gaps, and quantum Hall effect in graphene.
    arXiv:0806.2136;
    Phys. Rev. B 77 (2008) 205409.

  46. V.P. Gusynin, V.A. Miransky, S.G. Sharapov, I.A. Shovkovy.
    Edge states in quantum Hall effect in graphene.
    Low Temp. Phys. 34 (2008) 778-789.
    [Russian original: Fiz. Nizk. Temp. 34 (2008) 993-1006.]

  47. E.F. Suprunenko, E.V. Gorbar, S.G. Sharapov, V.M. Loktev.
    Effect of next-to-nearest neighbor hopping on electronic properties of graphene.
    Low Temp. Phys. 34 (2008) 812-817.
    [Russian original: Fiz. Nizk. Temp. 34 (2008) 1033–1039.]

  48. V.P. Gusynin, V.A. Miransky, S.G. Sharapov, I.A. Shovkovy, C.M. Wyenberg.
    Edge states on graphene ribbon in magnetic field: interplay between Dirac and ferromagnetic-like gaps.
    arXiv:0801.0708;
    Phys. Rev. B 79 (2009) 115431.

  49. V.P. Gusynin, S.G. Sharapov, J.P. Carbotte.
    On the universal AC optical background in graphene.
    arXiv:0908.2803;
    New J. Phys. (2009) 026222 (Focus on Graphene issue).

Preprints and papers submitted for publication

  1. P.I. Fomin, S.G. Sharapov.
    Bose-condensation in limited quasi-two-dimensional systems and critical temperatures of HTSC ceramics.
    Preprint ITP-94-11R. (In Russian)

  2. Irene D'Amico, S.G. Sharapov.
    Universal scaling of Coulomb drag in graphene layers.
    cond-mat/0410769;

  3. V.P. Gusynin, V.A. Miransky, S.G. Sharapov, I.A. Shovkovy.
    Excitonic gap, phase transition, and quantum Hall effect in graphene: strong-coupling regime.
    cond-mat/0612488;

  4. J.P. Carbotte, E.J. Nicol, S.G. Sharapov.
    Effect of electron-phonon interaction on spectroscopies in graphene.
    arXiv:0908.2608;

Invited talks

  1. S.G. Sharapov.
    Dirac fermions as a cause of unusual Quantum Hall Effect in Graphene.
    March 2006 Meeting of the American Physical Society. (Baltimore, Maryland, March 13-17, 2006.)

  2. S.G. Sharapov.
    Dirac-like quasiparticles in Graphene.
    Congress of the Canadian Association of Physicists. (University of Saskatchewan, Saskatoon, Saskatchewan June 17-20, 2007.)

  3. S.G. Sharapov.
    Effect of the electron-phonon interaction on spectroscopies of graphene.
    Workshop on Graphene: Fundamentals and Perspectives. (Benasque, Spain, July 26 - Aug 08, 2009.)

Conference contributions: Proceedings and Abstracts

  1. S.G. Sharapov.
    Bose-condensation in limited quasi-two-dimensional systems and critical temperatures of HTSC ceramics.
    In: Proceedings of the First Ukrainian Conference of Young Scientists. (Kiev, Ukraine; May 1994) pp.25--32. (in Russian)

  2. E.V. Gorbar, V.M. Loktev, S.G. Sharapov.
    Electronic spectrum of the layered cuprates.
    Scientific Session of Bogolyubov Institute for Theoretical Physics. (Kiev, Ukraine; February 22-23, 1995)

  3. S.G. Sharapov.
    Crossover from BCS to Bose Superconductivity in Quasi-2D systems.
    In: Proceedings of the Second Ukrainian Conference of Young Scientists. (Kiev, Ukraine; May 19-18, 1995) pp.33--40. (in English)

  4. E.V. Gorbar, V.M. Loktev, S.G. Sharapov(*).
    Crossover from BCS to Local Pair Superconductivity in Quasi-2D systems.
    In: Proceedings International Workshop "Statistical physics and condensed matter theory" (Lviv, Ukraine; September 11-14, 1996), Condensed Matter Physics, Lviv, No.7 (1997) pp.53-59.

  5. V.P. Gusynin, V.M. Loktev, R.M. Quick and S.G. Sharapov(*).
    Pseudogap phase formation in the crossover from Bose-Einstein condensation to BCS superconductivity in low dimensional systems.
    Invited paper in: Proceedings of the First International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials. (Baton-Rouge, Louisiana, USA; February 19-24, 1998)
    cond-mat/9803142;
    Int. J . Mod. Phys. B12 (1998) pp.3035-3038.

  6. R.M. Quick(*), S.G. Sharapov, V.P. Gusynin and V.M. Loktev.
    Pseudogap phase formation in the crossover from Bose-Einstein condensation to BCS superconductivity in low dimensional systems.
    In: Proceedings of XVI International Workshop on Condensed Matter Theories. (Nashville, Tennessee, June 5-10, 1998)
    Condensed Matter Theories, Vol. 14. edited by D.J.Ernst et al. pp.151-163, Ed. (Plenum 2000)

  7. V.P. Gusynin, V.M. Loktev, R.M. Quick and S.G. Sharapov(*).
    Phase fluctuations and non-Fermi liquid properties of 2D Fermi-system with attraction.
    Invited paper in: Proceedings of the Second International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials. (Las Vegas, Nevada, USA; May 31- June 4, 1999)
    cond-mat/9906407;
    Int. J . Mod. Phys. B13 (1999) pp.3510-3512.

  8. V.M. Loktev(*), R.M. Quick and S.G. Sharapov.
    Effect of Nonmagnetic Impurities on Pseudogap Properties of a 2D Metallic System.
    Proceedings of the Bogolyubov Conference on Problems of Theoretical and Mathematical Physics. (Kyiv, October 4-6, 1999) Edited by A.G. Sitenko
    Ukrainian J. Phys. 45 (2000) pp.535-540.

  9. S.G. Sharapov(*), H. Beck, V.M. Loktev.
    Ginzburg-Landau theory for the time-dependent phase field in a two-dimensional d-wave superconductor.
    Invited paper in: Proceedings of the Third International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials. (Honolulu, Hawaii, USA; January 15- 19, 2001)
    cond-mat/0101353;
    Physica C 364-365 (2001) pp.437-440.

  10. S.G. Sharapov(*), H. Beck, V.M. Loktev.
    Ginzburg-Landau theory for the time-dependent phase field in a 2D d-wave superconductor.
    Meeting of the Swiss Physical Society, Dubendorf, 2 May, 2001.

  11. S.G. Sharapov(*), H. Beck.
    Carlson-Goldman mode in d-wave superconductors.
    Poster presentation at the Swiss Workshop on Materials with Novel Electronic Properties (MaNEP). (Les Diablerets, Switzerland, October 1 - 3, 2001)

  12. S.G. Sharapov(*), H. Beck.
    Carlson-Goldman mode in d-wave superconductors,
    Meeting of the Swiss Physical Society, Lausanne, 1 March, 2002.

  13. S.G. Sharapov(*), H. Beck.
    Carlson-Goldman mode in d-wave superconductors: Effective Action Approach.
    Poster presentation at the 19-th General Conference of the EPS Condensed Matter Division. (Brighton, England, April 7 - 11, 2002)

  14. S.G. Sharapov(*), V.P. Gusynin, H. Beck.
    Low Temperature Superfluid Stiffness of d-wave Superconductor in an Applied Magnetic Field.
    Poster presentation at the International Workshop "Non-Fermi-Liquid Physics in Transition Metal and Rare Earth Compounds". (Bled, Slovenia, May 23 - 26, 2002)

  15. S.G. Sharapov(*), V.P. Gusynin, H. Beck.
    Low Temperature Superfluid Density of d-wave Superconductor in an Applied Magnetic Field.
    International Conference "MODERN PROBLEMS OF THEORETICAL PHYSICS (MPTP-2002)" Dedicated to the 90th anniversary of A.S.Davydov. Kyiv, Ukraine, December 9-15, 2002.
    Ukrainian J. Phys. 48 (2003) pp.863-868.

  16. H. Beck(*), Ph. Curty, A. Sewer, N. Andrenacci, S. Sharapov.
    Pairing fluctuations in high temperature superconductors.
    International Conference "MODERN PROBLEMS OF THEORETICAL PHYSICS (MPTP-2002)" Dedicated to the 90th anniversary of A.S.Davydov. Kyiv, Ukraine, December 9-15, 2002.
    Ukrainian J. Phys. 48 (2003) pp.829-836.

  17. S.G. Sharapov(*), V.P. Gusynin, H. Beck.
    Transport properties in d-density wave state in an external magnetic field: Wiedemann-Franz law, Materials with Novel Electronic Properties (MaNEP) Topical Meeting ``Non-Fermi Liquids and Low Dimensional Systems, Neuchatel, February 10, 2003.

  18. S.G. Sharapov(*), V.P. Gusynin, H. Beck.
    d-density wave state in an external magnetic field.
    Meeting of the Swiss Physical Society, Basel, 20 March, 2003.

  19. S.G. Sharapov(*), V.P. Gusynin, H. Beck.
    d-density wave state in an external magnetic field, Poster presentation at 7-th International Conference on "Materials and Mechanisms of Superconductivity and High Temperature Superconductors". (Rio de Janeiro, Brasil, May 25-30, 2003) cond-mat/0304574;
    Physica C 408-410 (2004) pp.420-421.

  20. S.G. Sharapov(*), V.P. Gusynin, H. Beck.
    Magnetic oscillations in planar systems with the Dirac-like spectrum of quasiparticle excitations.
    Poster presentation at the Swiss Workshop on Materials with Novel Electronic Properties (MaNEP). (Les Diablerets, Switzerland, September 29 - October 1, 2003)

  21. L. Benfatto(*), S.G. Sharapov, H. Beck.
    Effect of orbital currents on the restricted optical sum rule.
    Poster presentation at the Swiss Workshop on Materials with Novel Electronic Properties (MaNEP). (Les Diablerets, Switzerland, September 29 - October 1, 2003)

  22. S.G. Sharapov(*), V.P. Gusynin, H. Beck.
    Magnetic oscillations in planar systems with the Dirac-like spectrum of quasiparticle excitations.
    Oral presentation at BOGOLYUBOV KYIV CONFERENCE: Modern Problems of Mathematics and Theoretical Physics. (Kyiv, Ukraine, 13-16 September, 2004.)

  23. S.G. Sharapov.
    Quantum magnetic oscillations in graphene.
    Scientific Session of Bogolyubov Institute for Theoretical Physics. (Kiev, Ukraine; January 28-29, 2004) (2nd Award for the presentation)

  24. S.G. Sharapov.
    Planar systems with the Dirac-like spectrum of quasiparticle excitations in a quantizing magnetic field.
    Oral and poster presentation at "Quantum Materials Summer School" of the Canadian Institute for Advanced Research. (Vancouver, May 15-18, 2005.)

  25. S.G. Sharapov(*), J.P. Carbotte.
    Superfluid density and competing orders in d-wave superconductors.
    Contributed talk at the March 2006 Meeting of the American Physical Society. (Baltimore, Maryland, March 13-17, 2006.)

  26. T. Timusk(*), J.-S. Hwang, J. Yang, S. Sharapov, J. Carbotte, D. Bonn, R. Liang, W. Hardy.
    The optical conductivity of Ortho II YBa2Cu3O6.5.
    Contributed talk at the March 2006 Meeting of the American Physical Society. (Baltimore, Maryland, March 13-17, 2006.)

  27. S.G. Sharapov.
    The AC Conductivity of Monolayer Graphene.
    Workshop "Electronic Properties of Graphene". Kavli Institute for Theoretical Physics. Santa Barbara, California, January 8-19, 2007.

  28. S.G. Sharapov(*), V.P. Gusynin, J.P. Carbotte.
    Magneto-optical conductivity in Graphene: signatures of the Dirac quasiparticles.
    Contributed talk at the March 2007 Meeting of the American Physical Society. (Denver, Colorado, March 5-9, 2007.)

  29. S.G. Sharapov.
    The Magneto-Optical Response of the Dirac Quasiparticles in Graphene.
    Workshop on "Relativistic dynamics of graphene". Institute for Nuclear Theory, University of Washington, Seattle, January 8 - 11, 2008.

  30. S.G. Sharapov.
    Optical conductivity of graphene.
    Scientific Session of Bogolyubov Institute for Theoretical Physics. (Kiev, Ukraine; November 24-25, 2008) (1st Award for the presentation)

Invited seminars and colloquia

I did not keep a track of precise titles and dates of my seminars prior to coming to the University of Neuchâtel in 2000. Thus only years and places are indicated for the period 1994-2000.
  1. Numerous seminars (practically on each published paper) at the NPCM and AEP divisions of the Bogolyubov Institute for Theoretical Physics, Kiev.

  2. Institute for Condensed Matter Physics of the National Academy of Science of Ukraine, Lviv, 1995 (PhD thesis presentation).

  3. Institute of Mathematics of the National Academy of Science of Ukraine, Kiev, 1996 (PhD thesis presentation).

  4. Department of Physics, University of Pretoria, South Africa, 1997.

  5. Department of Physics, University of the Witwatersrand, Johannesburg, South Africa, 1997, 1998.

  6. Institut de Physique, Universite de Neuchatel, Switzerland (formal and numerous informal presentation at ``Supra'' (Superconductivity) Club).

  7. Phase fluctuations and non-Fermi liquid properties of 2D Fermi systems with attraction, Meeting Systemes Electroniques Fortement Correles, Universite de Fribourg, Switzerland, 10 November, 2000.

  8. Phase fluctuations and Pseudogap Properties , seminar at the Institute for Theoretical Physics, ETH, Zurich, 7 March, 2001.

  9. Carlson-Goldman mode in d-wave superconductors, Meeting Systemes Electroniques Fortement Correles, Universite de Fribourg, Switzerland, 26 October, 2001.

  10. Low temperature superfluid stiffness of d-wave superconductor in an applied magnetic field, Department de Physique de la Matiere Condensee, Universite de Geneve, Switzerland, 13 March, 2002.

  11. Low temperature superfluid stiffness of d-wave superconductor in an applied magnetic field, Institute of Theoretical Physics, University of Leipzig, Germany, 30 April, 2002.

  12. Carlson-Goldman mode in d-wave superconductors: ``violation'' of the Higgs mechanism, Institute of Theoretical Physics, University of Leipzig, Germany, 2 May, 2002.

  13. Low temperature superfluid stiffness of d-wave superconductor in an applied magnetic field, Meeting Systemes Electroniques Fortement Correles, Universite de Lausanne, Switzerland, 15 November, 2002.

  14. Low temperature superfluid stiffness of d-wave superconductor in an applied magnetic field, Physics Department, University of Camerino, Italy, 5 March, 2003.

  15. d-density wave state in an external magnetic field, Institute for Scientific Interchange, Torino, Italy, 7 March, 2003.

  16. Magnetic oscillations in planar systems with the Dirac-like spectrum of quasiparticle excitations, Torino Politecnico, Italy, 4 November, 2003.

  17. Phase fluctuations and pseudogap properties: BCS-Bose crossover in 2D systems, Institute of Mathematics of the National Academy of Science of Ukraine, Kiev, 23 September, 2004.

  18. de Haas - van Alphen effect in graphene, Institute of Magnetism of the National Academy of Science of Ukraine, Kiev, 30 September, 2004.

  19. Phase fluctuations and pseudogap properties: BCS-Bose crossover in 2D systems, Institute of Magnetism of the National Academy of Science of Ukraine, Kiev, 7 October, 2004.

  20. Condensed matter systems with a linear dispersion of quasiparticle excitations in an external magnetic field, The University of Western Ontario, London, Canada, 6 May, 2005.

  21. Dirac-like quasiparticles in an external magnetic field: graphene and d-density waves, Brock University, St. Catharines, Canada, 20 September, 2005.

  22. Dirac-like quasiparticles in Graphene, Bogolyubov Institute for Theoretical Physics of the National Academy of Science of Ukraine, Kiev, 16 July, 2007.

  23. Dirac-like quasiparticles in Graphene, Department of Physics, Western Illinois University, Macomb, 28 September, 2007.

Last modified 20 August 2009 by Sergei Sharapov
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