Jelena Sjakste
École Polytechnique
46 Papers
279 Citations
Jelena Sjakste is an academic researcher from École Polytechnique. The author has contributed to research in topics: Scattering & Phonon. The author has an hindex of 17, co-authored 38 publications. Previous affiliations of Jelena Sjakste include Université Paris-Saclay & University of Paris-Sud.
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Papers
Boron carbides from first principles
Nathalie Vast,Jelena Sjakste,Emmanuel Betranhandy +2 more
- 01 Jun 2009
TL;DR: In this article, the physical properties of boron carbides with theoretical methods based on density functional theory (DFT) have been investigated, together with the comparison with the experiments of the theoretical vibrational or NMR spectra has led to the determination of the atomic structure of B4C as C-B-C chains linking mostly B11C icosahedra, and a few percents of B10C2 icosahedral.
106
Hot electron relaxation dynamics in semiconductors: assessing the strength of the electron–phonon coupling from the theoretical and experimental viewpoints
TL;DR: This review aims to treat the progress in the understanding of the electron-phonon coupling which can be gained from both, on the basis of recently obtained results, and discusses the concept of hot electron ensemble, proposed recently to describe the hot-electron relaxation dynamics in GaAs.
68
Ab initio calculation of electron-phonon scattering time in germanium
TL;DR: In this paper, the intervalley scattering time in n-type germanium from thevalley to the L, �,a ndX valleys, has been computed ab initio with a method based on the density functional perturbation theory.
44
Carbon-rich icosahedral boron carbide designed from first principles
TL;DR: In this paper, the carbon-rich boron carbide (B11C)C-C has been designed from first principles within the density functional theory, and the structural modification consists in removing borons atoms from the chains linking icosahedra.
38
Formation of hot-electron ensembles quasiequilibrated in momentum space by ultrafast momentum scattering of highly excited hot electrons photoinjected into the Γ valley of GaAs
Hiroshi Tanimura,Jun'ichi Kanasaki,Katsumi Tanimura,Jelena Sjakste,Nathalie Vast,Matteo Calandra,Francesco Mauri +6 more
TL;DR: In this article, the authors studied the ultrafast scattering dynamics of hot electrons photoinjected with high excess energies in the conduction band of GaAs, using time and angle-resolved photoemission spectroscopy and ab initio calculations.