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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Electron-phonon scattering effects on electronic and optical properties of orthorhombic GeS

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Author(s):
Villegas, Cesar E. P. ; Rocha, A. R. ; Marini, Andrea
Total Authors: 3
Document type: Journal article
Source: Physical Review B; v. 94, n. 13 OCT 19 2016.
Web of Science Citations: 3
Abstract

Group-VI monochalcogenides are attracting a great deal of attention due to their peculiar anisotropic properties. Very recently, it has been suggested that GeS could act as a promissory absorbing material with high input-output ratios, which are relevant features for designing prospective optoelectronic devices. In this work, we use the ab initio many-body perturbation theory to study the role of electron-phonon coupling on orthorhombic GeS. We identify the vibrational modes that efficiently couple with the electronic states responsible for giving rise to the first and second excitonic state. We also study finite-temperature optical absorption, and we show that even at T -> 0 K, the role of the electron-phonon interaction is crucial to properly describe the position and width of the main experimental excitation peaks. Our results suggest that the electron-phonon coupling is essential to properly describe the optical properties of the monochalcogenides family. (AU)

FAPESP's process: 15/14899-0 - Exciton-phonon coupling effects on the optical properties of semiconductors: an ab-initio density functional theory approach
Grantee:César Enrique Pérez Villegas
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 12/24227-1 - Optical properties ánd charge-transfer process studies for efficient organic photovoltaic cells: ab-initio simulations
Grantee:César Enrique Pérez Villegas
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 11/11973-4 - ICTP South American Institute for Fundamental Research: a regional center for theoretical physics
Grantee:Nathan Jacob Berkovits
Support type: Research Projects - Thematic Grants