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Featured researches published by Samuel Poncé.


Computer Physics Communications | 2016

EPW: Electron–phonon coupling, transport and superconducting properties using maximally localized Wannier functions

Samuel Poncé; Elena R. Margine; Carla Verdi; Feliciano Giustino

Abstract The EPW ( E lectron- P honon coupling using W annier functions) software is a Fortran90 code that uses density-functional perturbation theory and maximally localized Wannier functions for computing electron–phonon couplings and related properties in solids accurately and efficiently. The EPW v4 program can be used to compute electron and phonon self-energies, linewidths, electron–phonon scattering rates, electron–phonon coupling strengths, transport spectral functions, electronic velocities, resistivity, anisotropic superconducting gaps and spectral functions within the Migdal–Eliashberg theory. The code now supports spin–orbit coupling, time-reversal symmetry in non-centrosymmetric crystals, polar materials, and k and q -point parallelization. Considerable effort was dedicated to optimization and parallelization, achieving almost a ten times speedup with respect to previous releases. A computer test farm was implemented to ensure stability and portability of the code on the most popular compilers and architectures. Since April 2016, version 4 of the EPW code is fully integrated in and distributed with the Quantum ESPRESSO package, and can be downloaded through QE-forge at http://qe-forge.org/gf/project/q-e . Program summary Program title: EPW Catalogue identifier: AEHA_v2_0 Program summary URL: http://cpc.cs.qub.ac.uk/summaries/AEHA_v2_0.html Program obtainable from: CPC Program Library, Queen’s University, Belfast, N. Ireland Licensing provisions: GNU General Public Licence 3 No. of lines in distributed program, including test data, etc.: 1635099 No. of bytes in distributed program, including test data, etc.: 22533187 Distribution format: tar.gz Programming language: Fortran 90, MPI. Computer: Non-specific. Operating system: Unix/Linux. RAM: Typically 2GB/core Classification: 7.3, 7.8, 7.9. External routines: LAPACK, BLAS, MPI, FFTW, Quantum- ESPRESSO package [1] Does the new version supersede the previous version?: Yes Nature of problem: Calculation of electron and phonon self-energies, linewidths, electron–phonon scattering rates, electron–phonon coupling strengths, transport spectral functions, electronic velocities, resistivity, anisotropic superconducting gaps and spectral functions within the Migdal–Eliashberg theory. Solution method: The code relies on density-functional perturbation theory and maximally localized Wannier functions. Reasons for new version: New features (listed in the paper) and optimization of the code. Summary of revisions: Recent developments and new functionalities are described in Section 2 of the paper. Running time: Up to several hours on several tens of processors. References: [1] P. Giannozzi, etxa0al., J. Phys. Condens. Matter 21 (2009), 395502, http://www.quantum-espresso.org/ .


Advanced Optical Materials | 2017

Assessment of First-Principles and Semiempirical Methodologies for Absorption and Emission Energies of Ce3+-Doped Luminescent Materials

Yongchao Jia; Samuel Poncé; Anna Miglio; Masayoshi Mikami; Xavier Gonze


Electron-phonon Meeting | 2013

Validation of the zero-point motion calculations and many-body effects in diamond

Samuel Poncé; Gabriel Geadah-Antonius; Paul Boulanger; Elena Cannucia; Andrea Marini; Michel Côté; Xavier Gonze


CAP Annual meeting | 2013

The Zero-Point Renormalization in Diamond

Gabriel Geadah-Antonius; Samuel Poncé; Paul Boulanger; Michel Côté; Xavier Gonze


Abinit core-developer meeting | 2013

Electron-phonon matrices and symmetries in Abinit

Samuel Poncé; Yannick Gillet; Matteo Giantomassi; Matthieu Verstraete; Xavier Gonze


6 th International Abinit Devel- oper Workshop | 2013

Validation based on electron-phonon matrix element in Abinit and PWSCF/Yambo

Samuel Poncé; Martin Stankovski; Gabriel Geadah-Antonius; Michel Côté; Xavier Gonze


18th ETSF Workshop on Electronic Excitations | 2013

Validation of calculations based on electron-phonon matrix elements in Abinit and QE/Yambo

Samuel Poncé; Gabriel Geadah-Antonius; Paul Boulanger; Elena Cannuccia; Andrea Marini; Michel Côté


Validation and Verification in Electronic-Structure calculations: state of the art and perspective | 2012

Successes and problems of verification and validation: electron-phonon and pseudopotentials comparisons

Samuel Poncé; Martin Stankovski; Gian-Marco Rignanese; Gabriel Geadah-Antonius; Michel Côté; Xavier Gonze


Photoluminescence in rare earths: photonic materials and device | 2012

Ab initio and experimental study of the optical properties of alkaline-earth chalcogenide

Samuel Poncé; Xavier Gonze; Bruno Bertrand; Philippe Smet; Dirk Poelman; Masayoshi Mikami


9th ETSF Young Researcher's Meeting [also part of the local organizing committee] | 2012

Validation based on electron-phonon matrix element in Abinit and PWSCF/Yambo/EPW

Samuel Poncé; Martin Stankovski; Andrea Marini; Gabriel Geadah-Antonius; Michel Côté; Xavier Gonze

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Michel Côté

Université de Montréal

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Xavier Gonze

Université catholique de Louvain

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Paul Boulanger

Université de Montréal

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Martin Stankovski

Université catholique de Louvain

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Andrea Marini

University of Rome Tor Vergata

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Xavier Gonze

Université catholique de Louvain

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Anna Miglio

Université catholique de Louvain

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Bruno Bertrand

Université catholique de Louvain

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