Výsledky vyhledávání - "Wilfried Desrat"

Akademický článek

Autor: Bernard Gil, Wilfried Desrat, Adrien Rousseau, Christine Elias, Pierre Valvin, Matthieu Moret, Jiahan Li, Eli Janzen, James Howard Edgar, Guillaume Cassabois

Publikováno v: Crystals, Vol 12, Iss 6, p 782 (2022)

The sp2-bonded layered compound boron nitride (BN) exists in more than a handful of different polytypes (i.e., different layer stacking sequences) with similar formation energies, which makes obtaining a pure monotype of single crystals extremely tri

Externí odkaz: https://doaj.org/article/8934c473be5f4dad8c4d3d9d376330ef

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Bernal Boron Nitride Crystals Identified by Deep-Ultraviolet Cryomicroscopy

Autor: Adrien Rousseau, Pierre Valvin, Wilfried Desrat, Lianjie Xue, Jiahan Li, James H. Edgar, Guillaume Cassabois, Bernard Gil

Publikováno v: ACS nano. 16(2)

The presence of metastable Bernal stacking boron nitride is verified by combining second harmonic generation (SHG) and photoluminescence (PL) spectroscopy. The scanning confocal cryomicroscope, operating in the deep-ultraviolet range, shows a one-to-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73d3e543a5d57ad38b0872022191af02
https://pubmed.ncbi.nlm.nih.gov/35099926

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Determination of the optical bandgap of the Bernal and rhombohedral boron nitride polymorphs

Autor: Wilfried Desrat, James H. Edgar, Lianjie Xue, Eli Janzen, Guillaume Cassabois, Adrien Rousseau, Jiahan Li, Pierre Valvin, Bernard Gil, Matthieu Moret

Publikováno v: Physical Review Materials
Physical Review Materials, American Physical Society, 2021, 5, pp.064602. ⟨10.1103/PhysRevMaterials.5.064602⟩

International audience; We report a study of polymorphic boron nitride samples. We interpret the photoluminescence line at 6.032±0.005 eV, that can be recorded at 8K in sp2-bonded boron nitride, as being the signature of the excitonic fundamental ba

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c21fb7309bcfb44befa63e62233a4a17
https://doi.org/10.1103/physrevmaterials.5.064602

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Unconventional reentrant quantum Hall effect in a HgTe/CdHgTe double quantum well

Autor: M. V. Yakunin, S. M. Podgornykh, Benoit Jouault, Wilfried Desrat, Sergey A. Dvoretsky, Frederic Teppe, Sergey S. Krishtopenko, N. N. Mikhailov, V. N. Neverov, M. R. Popov

Publikováno v: Physical Review B
Physical Review B, American Physical Society, 2020, 102 (16), ⟨10.1103/PhysRevB.102.165305⟩

We report on observation of an unconventional structure of the quantum Hall effect (QHE) in a $ p$-type HgTe/Cd$_x$Hg$_{1-x}$Te double quantum well (DQW) consisting of two HgTe layers of critical width. The observed QHE is a reentrant function of mag

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9096a6295ee1f9c14a29f84ce770780
https://hal.archives-ouvertes.fr/hal-03036349

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Système de supervision d'une centrale photovoltaïque pour les particuliers

Autor: Franck Lecat, Wilfried Desrat

Publikováno v: Colloque sur les Objets et systèmes Connectés
Colloque sur les Objets et systèmes Connectés, Ecole Supérieure de Technologie de Casablanca (Maroc), Institut Universitaire de Technologie d'Aix-Marseille (France), Jun 2019, CASABLANCA, Maroc
HAL

International audience; Nous présentons un système de supervision dédié aux centrales photovoltaïques des particuliers reliées au réseau d'énergie. Le module est piloté par un microcontrôleur, qui lit les informations relatives à la produc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::8377ce8a322ef75067a98b5494addb8f
https://hal.archives-ouvertes.fr/hal-02298838

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Massless Dirac fermions in III-V semiconductor quantum wells

Autor: Vladimir I. Gavrilenko, Eric Tournié, Jeremie Torres, K. E. Spirin, Christophe Consejo, Benoit Jouault, Frederic Teppe, Sandra Ruffenach, Sergey S. Krishtopenko, Guilhem Boissier, Wojciech Knap, F. Gonzalez-Posada, K. V. Maremyanin, Wilfried Desrat, M. Zaknoune

Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2019, 99 (12), pp.121405. ⟨10.1103/PhysRevB.99.121405⟩
Physical Review B
Physical Review B, 2019, 99 (12), pp.121405. ⟨10.1103/PhysRevB.99.121405⟩

We report on the clear evidence of massless Dirac fermions in two-dimensional system based on III-V semiconductors. Using a gated Hall bar made on a three-layer InAs/GaSb/InAs quantum well, we restore the Landau levels fan chart by magnetotransport a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41e9264e25646c2401e0c1ebd52d135a
https://hal.archives-ouvertes.fr/hal-02072785/document

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Terahertz Spectroscopy of Two-Dimensional Semimetal in Three-Layer InAs/GaSb/InAs Quantum Well

Autor: Eric Tournié, Wojciech Knap, Sergey S. Krishtopenko, F. Gonzalez-Posada, Sandra Ruffenach, Guilhem Boissier, A. M. Kadykov, S. V. Morozov, Christophe Consejo, Benoit Jouault, Mikhail A. Fadeev, Wilfried Desrat, Frederic Teppe, Vladimir I. Gavrilenko, Vladimir Rumyantsev

Publikováno v: JETP Letters
JETP Letters, Springer Verlag, 2019, 109 (2), pp.96-101. ⟨10.1134/S0021364019020085⟩

The features of terahertz photoluminescence and magnetoabsorption in magnetic fields up to 16 T in threelayer InAs/GaSb/InAs quantum wells with a band structure corresponding to a “two-dimensional semimetal” are studied. The comparison of the pos

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7886d79348f701df530d20c6ae380cf
https://hal.archives-ouvertes.fr/hal-02157723

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Magneto-transport in inverted HgTe quantum wells

Autor: Jerzy Wróbel, I. Yahniuk, Vladimir I. Gavrilenko, K. E. Spirin, Sławomir Kret, Benoit Jouault, G. Grabecki, Nikolay N. Mikhailov, Wojciech Knap, Wilfried Desrat, Frederic Teppe, Alexander M. Kadykov, Grzegorz Cywiński, Dmytro B. But, Tomasz Dietl, Sergey A. Dvoretsky, Sergey S. Krishtopenko, Christophe Consejo, M. Majewicz

Publikováno v: npj Quantum materials. 2019. Vol. 4. P. 13 (1-8)
Npj Quantum Materials
Npj Quantum Materials, Nature publishing, 2019, 4, pp.13. ⟨10.1038/s41535-019-0154-3⟩
npj Quantum Materials, Vol 4, Iss 1, Pp 1-8 (2019)

HgTe quantum wells (QWs) are two-dimensional semiconductor systems that change their properties at the critical thickness dc, corresponding to the band inversion and topological phase transition. The motivation of this work was to study magnetotransp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59b5240ff9aaf5875ffff19211ac117a
http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000673868

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Band splitting in Cd3As2 measured by magnetotransport

Autor: Milan Orlita, Christophe Consejo, Ernest Arushanov, Benjamin A. Piot, A. Nateprov, Wilfried Desrat, Frederic Teppe, Sergey S. Krishtopenko, Sandra Ruffenach, Wojciech Knap

Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2018, 97 (24), pp.245203. ⟨10.1103/PhysRevB.97.245203⟩

Magnetotransport measurements have been performed on (112)-oriented bulk Cd3As2 samples with in situ rotation at low temperature. The frequency analysis of the Shubnikov–de Haas oscillations reveals two weakly separated frequencies arising from two

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed4c1739fdbf5ae6c41f36411b5ed684
https://hal.archives-ouvertes.fr/hal-01827025

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Properties of MAPbI3 perovskite layers grown with HCl additions

Autor: Wilfried Desrat, Matthieu Moret, Olivier Briot, Antoine Tiberj

Publikováno v: Superlattices and Microstructures
Superlattices and Microstructures, Elsevier, 2018, 120, pp.136. ⟨10.1016/j.spmi.2018.05.033⟩
Superlattices and Microstructures, Elsevier, 2018, 120, pp.136. 〈10.1016/j.spmi.2018.05.033〉

International audience; Lead halide perovskites, used to produce photovoltaic devices, have been thesubject of a huge research effort these last years. This is due to the spectac-ular improvement of the conversion effciency results within a short amo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a9c46fe07df9a4d797d7b6c16648308e
https://hal.archives-ouvertes.fr/hal-01802768

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