2007
12th
NANOQUANTA Workshop on Electronic Excitations. Time-Dependent
Density-Functional Theory: Advances and Prospects
September
18-22, 2007 – Aussois, France.
Poster
contribution:
"Optical
spectra of Si nanocrystallits: Bethe-Salpeter and time-dependent
density-functional theory approaches",
L.E.
Ramos, J. Paier, G. Kresse, and F.
Bechstedt.
4th
NANOQUANTA young researchers' meeting,
May 15-18, 2007 – San Sebastián (Donostia),
Spain.
Poster contribution:
"Optical
spectra of Si Nanocrystallites: Bethe-Salpeter and Time-Dependent
Density-Functional Theory Approaches",
L.E.
Ramos, J. Paier, G. Kresse, and F. Bechstedt.
NANOQUANTA
miniworkshop
"Integration Team 9 – "Integration of
Theory and Code Developments"
May 14, 2007 - San
Sebastián (Donostia), Spain.
L.E. Ramos
Frühjahrstagung
des Arbeitskreises Festkörperphysik bei der Deutsche
Physikalische Gesellschaft
(Spring
Meeting of the Condensed Matter Division of the German Physical
Society).
March 26-30, 2007 - Regensburg, Germany.
Talk
contribution:
"Influence
of doping and codoping on the electronic and optical properties of Si
nanocrystallites",
L.E. Ramos, J.
Furthmüller, and F. Bechstedt.
2006
Materials Research Society (MRS) - Fall
meeting 2006
November 27-December
1, 2006 - Boston, U.S.A.
Talk contribution:
"Influence
of doping and co-doping on the optical and electronic properties of
Si Nanocrystallites",
L.E.
Ramos, J. Furthmüller, and F. Bechstedt.
11th NANOQUANTA Workshop on Electronic
Excitations: A decade of applications of the Bethe-Salpeter
Equation
September 19-22,
2006 – Houffalize, Belgium.
Talk
contribution:
"Additional
many-body effects in the absorption spectra of Si nanocrystallites
",
L.E.
Ramos, J. Furthmüller, and F.
Bechstedt.
European Materials Research Society (E-MRS)
- Fall meeting 2006
September 4-8,
2006 - Warsaw, Poland.
Talk contribution:
"Influence
of Doping and Co-doping on the Optical and Electronic Properties of
Si Nanocrystallites",
L.E.
Ramos, J. Furthmüller, and F. Bechstedt.
European Materials Research Society (E-MRS)
- Spring meeting 2006
May 29 - June 2, 2006 - Nice,
France.
Talk contribution:
"Influence
of codoping on the electronic and optical properties of Si
nanocrystallites",
L.E. Ramos, J.
Furthmüller, and F. Bechstedt.
3rd
NANOQUANTA young researchers' meeting,
May 3-5, 2006 -
Rome, Italy.
Poster contribution:
"Optical
absorption spectra of Si nanocrystallites with additional many-body
effects",
L.E. Ramos, J. Furthmüller,
and F. Bechstedt.
Frühjahrstagung
des Arbeitskreises Festkörperphysik bei der Deutsche
Physikalische Gesellschaft
(Spring Meeting of the Condensed
Matter Division of the German Physical Society).
March 27-31,
2006 - Dresden, Germany.
Talk contribution:
"Influence
of doping on the electronic and optical properties of Si
nanocrystallites",
L.E. Ramos, J.
Furthmüller, and F. Bechstedt.
"Programming
Parallel Computers"
January 23-27, 2006 - Jülich,
Germany.
Poster contribution:
"Additional
many-body effects applied to molecules and nanostructures",
L.E.
Ramos, J. Furthmüller, and Bechstedt.
2005
NANOQUANTA miniworkshop
"Specification
of file formats for NANOQUANTA"
November 15-16, 2005 -
Louvain-la-neuve, Belgium.
Talk contribution:
"File
formats of the VASP",
L.E.
Ramos and J. Furthmüller.
40
Years of the GW Approximation for the electronic Self-Energy:
Achievements and Challenges
September 12-15, 2005 -
Physikzentrum Bad Honnef, Germany.
Talk contribution:
"Electronic
and Optical Properties of Si and Ge Nanocrystallites: Influence of
Oxidation, Capping, and Doping",
L.E. Ramos,
J. Furthmüller, and F. Bechstedt.
European Materials Research Society (E-MRS)
- Spring meeting 2005
May 30 - June 3, 2005 -
Strasbourg, France.
Poster contribution:
"Quantum
Confinement in Silicon and Germanium Capped Nanocrystallites",
L.E.
Ramos, J. Furthmüller, and F. Bechstedt.
Nanomeeting 2005,
May
23-27, 2005 - Minsk, Belarus.
Poster contribution:
"Electronic
and Optical Properties of Si-capped and Ge-capped
Nanocrystallites"
L.E. Ramos,
J. Furthmüller, and F. Bechstedt.
2nd NANOQUANTA young researchers'
meeting
May 2-4, 2005 - Berlin, Germany.
Talk
contribution:
"Electronic
and optical properties of Si and Ge capped nanocrystallites",
L.E.
Ramos, J. Furthmüller, and F. Bechstedt.
Frühjahrstagung des Arbeitskreises
Festkörperphysik bei der Deutsche Physikalische
Gesellschaft
(Spring Meeting of the Condensed Matter
Division of the German Physical Society).
March 4-9, 2005 -
Berlin, Germany.
Talk contribution:
"Electronic
and optical properties of capped Si and Ge nanocrystallites",
L.E.
Ramos, J. Furthmüller, and F. Bechstedt.
2004
NANOEXC2004
Workshop on: "Theory and Modeling of Electronic Excitations in
Nanoscience"
September
19 - September 23, 2004 - Acquafredda di Maratea
(PZ), Italy.
Talk contribution:
"Excitation
energies and optical properties of Si nanocrystallites",
L.E.
Ramos, J. Furthmüller, and F. Bechstedt.
3rd International Conference on
"Computational Modelling and Simulation of Materials
(CIMTEC)"
May 30 - June 4,
2004 - Acireale (CT) Sicily, Italy.
Talk contribution:
"Optical
properties of Si and Ge nanocrystals",
F. Bechstedt, H.-Ch. Weissker, L.E. Ramos, and J.
Furthmüller.
European Materials Research Society (E-MRS)
- Spring meeting 2004
May 23-28, 2004 - Strasbourg,
France.
Talk contribution:
"Structural
relaxation and oxidation: Influence on the optical and electronic
properties of Si nanocrystals",
L.E. Ramos,
H.-Ch. Weissker, J. Furthmüller, and F. Bechstedt.
1st
NANOPHASE/NANOQUANTA young researchers' meeting
May 6-8,
2004 - Palaiseau, France.
Talk contribution:
"Excitation
energies in oxidized Si nanocrystallites",
L.E.
Ramos, J. Furthmüller, and F. Bechstedt.
3°
Encontro de nanodispositivos semicondutores e materiais
nanoestruturados - NanoSemiMat-3
(3th meeting of
semiconductor nanodevices and nanostructured materials),
March
24-27, 2004 - Salvador (BA), Brazil.
Talk contribution:
"Electronic
excitations in Si and Ge nanocrystals: Parameterfree
calculations",
F. Bechstedt, H.-Ch. Weissker, L.E.
Ramos, and J. Furthmüller.
Frühjahrstagung des Arbeitskreises
Festkörperphysik bei der Deutsche Physikalische
Gesellschaft
(Spring Meeting of the Condensed Matter
Division of the German Physical Society).
March 8-12, 2004 -
Regensburg, Germany.
Talk contribution:
"Effects
of oxidation on silicon nanocrystallites",
L.E.
Ramos, J. Furthmüller, and F. Bechstedt.
2003
Ab-initio
Electron-Excitations Theory: Towards Systems of Biological
Interest
September 21-23, 2003 - San Sebastián/Donostia,
Spain.
Poster contributions:
"Quasiparticle
band structures and optical spectra of beta-cristobalite SiO2"
and
"Effects
of oxidation on silicon nanocrystallites",
L.E.
Ramos, J. Furthmüller, and F. Bechstedt.
Frühjahrstagung
des Arbeitskreises Festkörperphysik bei der Deutsche
Physikalische Gesellschaft
(Spring Meeting of the Condensed
Matter Division of the German Physical Society),
March 24-28,
2003 - Dresden, Germany.
Poster contribution:
"Group-IV
and group-V substitutional impurities in cubic group-III
nitrides",
L.E.
Ramos, J. Furthmüller, and F. Bechstedt.
Vienna
Ab initio Simulation Package (VASP) workshop
February
10-13, 2003 - Vienna, Austria.
2002
International Workshop on Nitride
Semiconductors
July 22-25, 2002 - Aachen, Germany.
Poster
contribution:
"Carbon-based
defects in GaN: Doping behaviour",
J. Furthmüller,
L.E. Ramos, F. Bechstedt, L.M.R. Scolfaro, and J.R. Leite.
2001
WideGap 2001
March 21-23, 2001 -
Exeter, England (UK).
Poster contribution:
"Ab
initio theory of native defects in alloys: application to charged N
vacancies in Al xGa1-x N",
L.E.
Ramos, J. Furthmüller, F. Bechstedt, L.M.R. Scolfaro, and
J.R. Leite.
2000
25th
International Conference on the Physics of Semiconductors
September
17-22, 2000 - Osaka, Japan.
Poster contribution:
"Carbon
acceptor impurity in cubic BN, AlN, GaN, and in the GaAlN alloy
",
M. Marques, L.E. Ramos, L.M.R.
Scolfaro, L.K. Teles, and J.R. Leite.
1999
9th
Brazilian Workshop on Semiconductor Physics
February 7-12,
1999 - Belo Horizonte (MG), Brazil.
Poster contribution:
"Effects
of in-plane magnetic field on the hole subband dispersion of p-type
planar-doped GaAs",
L.E.
Ramos, L.M.R. Scolfaro, G.M. Sipahi, and J.R. Leite.
XXII Encontro
Nacional de Física da Matéria Condensada
(XXII
National Meeting of Condensed Matter Physics)
May 11-15, 1999 -
São Lourenço (MG), Brazil.
Poster
contributions:
"Stability
and structural properties of c-BN, h-BN, and w-BN in the ab initio
FLAPW method",
L.E. Ramos, J.R. Leite,
L.M.R. Scolfaro, and J.L.P. Castineira.
"Vacancies
in boron nitride - a systematic ab-initio study",
J.L.P.
Castineira, J.R. Leite, L.E. Ramos, and L.M.R. Scolfaro.
1998
Short course: Calculo de propiedades
electronicas y dinamicas
(Calculation of electronic and
dynamic properties),
Universidad Nacional de General San Martin,
(UNSAM)
October 1998 - Buenos Aires, Argentina.
1997
8th Brazilian Workshop on Semiconductors
Physics
February 2-7, 1997 - Águas de Lindóia
(SP), Brazil.
Poster contribution:
"Self-consistent
hole miniband structure calculations of acceptor delta-doping GaAs
superlattices",
L.E.
Ramos, L.M.R. Scolfaro, G.M. Sipahi, R. Enderlein, and J.R.
Leite.
1995
Terceiro simpósio
de iniciação científica da Universidade de São
Paulo
(Third symposium of scientific initiation of the
University of São Paulo),
December 12-15, 1995 - São
Carlos (SP), Brazil.
Talk contribution:
"Estudo
do transporte elétrico em super-redes semicondutoras",
(Study
of the electric transport in semiconductor superlattices),
L.E.
Ramos and L.M.R. Scolfaro.
Last update 08.10.2007