Institution
École normale supérieure de Cachan
Education•Cachan, Île-de-France, France•
About: École normale supérieure de Cachan is a education organization based out in Cachan, Île-de-France, France. It is known for research contribution in the topics: Decidability & Finite element method. The organization has 2717 authors who have published 5585 publications receiving 175925 citations.
Papers published on a yearly basis
Papers
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01 Oct 2014
TL;DR: In this paper, the authors investigate theoretically both 2D and 3D Hybrid Organic/inorganic Perovskite (HOP) crystal structures based on Density Functional Theory (DFT) calculations and symmetry analyses.
Abstract: We herein investigate theoretically both 2D and 3D Hybrid Organic/inorganic Perovskite (HOP) crystal structures based on Density Functional Theory (DFT) calculations and symmetry analyses. Our findings reveal the universal features of the electronic band structure for the class of lead-halide hybrids (R-NH3)nPbXm, where (n,m)=(2,4) and (1,3) respectively for 2D and 3D structures. Among those, the large spin-orbit coupling acting on the conduction band is shown to play a major role on the band gap of these materials. Moreover, this approach can easily be generalized to related layered and 3D hybrids, thus providing a clear-sighted inside in their electronic and optical properties.
56 citations
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TL;DR: A new efficient method based on random walks on a lattice is used to compute gas diffusion in structures taken from real morphological data, which provides a new evidence of the existence of diffusional screening at the acinar level.
56 citations
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TL;DR: Evaluation of robustness and performances of two types of 1.2 kV SiC MOSFETs in order to investigate these power devices for aircraft applications in medium power range shows the weakness of the gate under short-circuit tests.
56 citations
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TL;DR: In this paper, a hybrid quantum circuit is used to detect magnetic resonance of electronic spins at low temperature, where a transmon qubit is coupled to a spin ensemble consisting of nitrogen-vacancy centers in diamond.
Abstract: A new method for detecting the magnetic resonance of electronic spins at low temperature is demonstrated. It consists in measuring the signal emitted by the spins with a superconducting qubit that acts as a single-microwave-photon detector, resulting in an enhanced sensitivity. We implement such an electron-spin resonance spectrometer using a hybrid quantum circuit in which a transmon qubit is coupled to a spin ensemble consisting of nitrogen-vacancy (NV) centers in diamond. With this setup we measure the NV center absorption spectrum at 30 mK at an excitation level of $\ensuremath{\sim}15\phantom{\rule{0.16em}{0ex}}{\ensuremath{\mu}}_{B}$ out of an ensemble of ${10}^{11}$ spins.
56 citations
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TL;DR: The 2PA results were eventually supported and confronted with theoretical DFT calculations of the two-photon transition oscillator strengths and in terms of EWG strength, degree of donor-acceptor charge transfer and electronic coupling between the arms.
Abstract: This article reports on a comprehensive study of the two-photon absorption (2PA) properties of six novel push-pull octupolar triarylamine compounds as a function of the nature of the electron-withdrawing groups. These compounds present an octupolar structure consisting of a triarylamine core bearing two 3,3′-bis(trifluoromethyl)phenyl arms and a third group with varying electron-withdrawing strength (H < CN < CHO < NO2 < Cyet < Vin). The 2PA cross-sections, measured by using the femtosecond open-aperture Z-scan technique, showed significant enhancement from 45 up to 125 GM for the lowest energy band and from 95 up to 270 GM for the highest energy band. The results were elucidated based on the large changes in the transition and permanent dipole moments and in terms of (i) EWG strength, (ii) degree of donor-acceptor charge transfer and (iii) electronic coupling between the arms. The 2PA results were eventually supported and confronted with theoretical DFT calculations of the two-photon transition oscillator strengths.
56 citations
Authors
Showing all 2722 results
Name | H-index | Papers | Citations |
---|---|---|---|
Shi Xue Dou | 122 | 2028 | 74031 |
Olivier Hermine | 111 | 1026 | 43779 |
John R. Reynolds | 105 | 607 | 50027 |
Shaul Mukamel | 95 | 1030 | 40478 |
Tomás Torres | 88 | 625 | 28223 |
Ifor D. W. Samuel | 74 | 605 | 23151 |
Serge Abiteboul | 73 | 278 | 24576 |
Stéphane Roux | 68 | 627 | 19123 |
Zeger Debyser | 67 | 404 | 16531 |
Louis Nadjo | 64 | 264 | 12596 |
Praveen K. Thallapally | 64 | 190 | 12110 |
Andrew Travers | 63 | 193 | 13537 |
Shoji Takeuchi | 63 | 692 | 14704 |
Bineta Keita | 63 | 274 | 12053 |
Yves Mély | 62 | 368 | 13478 |