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Journal articles
Tuning a Schottky barrier in a photoexcited topological insulator with transient Dirac cone electron-hole asymmetry
Mahdi Hajlaoui
1
E. Papalazarou
1
Julien Mauchain
1
Luca Perfetti
2
Amina Taleb-Ibrahimi
3
F. Navarin
1
M. Monteverde
1
P. Auban-Senzier
1
C. R. Pasquier
1
N. Moisan
4
Davide Boschetto
4
M. Neupane
5
M. Z. Hasan
5
T. Durakiewicz
6
Z. Jiang
7
Y. Xu
8
I. Miotkowski
8
Y. P. Chen
8
S. Jia
9
H. W. Ji
9
R. J. Cava
9
M. Marsi
1
7
Sch Phys
C. R. Pasquier 1
Author
N. Moisan 4
Author
Davide Boschetto 4
Author IdHAL : davide-boschetto ORCID : https://orcid.org/0000-0001-6516-0652
M. Neupane 5
Author
R. J. Cava 9
Author
M. Marsi 1
Author
1
LPS - Laboratoire de Physique des Solides (Bat. 510 91405 Orsay cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8502 (France)
- UP11 - Université Paris-Sud - Paris 11 (Bâtiment 300 - 91405 Orsay cedex - France)
2
LSI - Laboratoire des Solides Irradiés (Route de Saclay, F-91128 Palaiseau Cedex - France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : DRF/IRAMIS (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7642 (France)
- X - École polytechnique (École polytechnique, 91128 Palaiseau Cedex - France)
3
CASSIOPEE (France)
- SSOLEIL - Synchrotron SOLEIL (L'Orme des Merisiers Saint-Aubin - BP 48 91192 GIF-sur-YVETTE CEDEX - France)
- CNRS - Centre National de la Recherche Scientifique : UR1 (France)
4
LOA - Laboratoire d'optique appliquée (828, boulevard des Maréchaux 91762 Palaiseau Cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7639 (France)
- X - École polytechnique (École polytechnique, 91128 Palaiseau Cedex - France)
- ENSTA Paris - École Nationale Supérieure de Techniques Avancées (828, boulevard des Maréchaux 91762 Palaiseau Cedex - France)
6
LANL - Los Alamos National Laboratory (P.O. Box 1663 Los Alamos, NM 87545 - United States)
7
Sch Phys (United States)
- Georgia Institute of Technology [Atlanta] (North Avenue, Atlanta, GA 30332 - United States)
8
Dept Phys (United States)
- Purdue University [West Lafayette] (Hovde Hall, 610 Purdue Mall, West Lafayette, IN 47907 - United States)
Abstract : The advent of Dirac materials has made it possible to realize two-dimensional gases of relativistic fermions with unprecedented transport properties in condensed matter. Their photoconductive control with ultrafast light pulses is opening new perspectives for the transmission of current and information. Here we show that the interplay of surface and bulk transient carrier dynamics in a photoexcited topological insulator can control an essential parameter for photoconductivity-the balance between excess electrons and holes in the Dirac cone. This can result in a strongly out of equilibrium gas of hot relativistic fermions, characterized by a surprisingly long lifetime of more than 50 ps, and a simultaneous transient shift of chemical potential by as much as 100 meV. The unique properties of this transient Dirac cone make it possible to tune with ultrafast light pulses a relativistic nanoscale Schottky barrier, in a way that is impossible with conventional optoelectronic materials.
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Journal articles
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https://hal-polytechnique.archives-ouvertes.fr/hal-01011937
Contributor : Gaëlle Bruant Connect in order to contact the contributor
Submitted on : Wednesday, June 25, 2014 - 9:34:16 AM
Last modification on : Monday, January 10, 2022 - 10:16:08 AM
Contributor : Gaëlle Bruant Connect in order to contact the contributor
Submitted on : Wednesday, June 25, 2014 - 9:34:16 AM
Last modification on : Monday, January 10, 2022 - 10:16:08 AM
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- HAL Id : hal-01011937, version 1
- DOI : 10.1038/ncomms4003
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Citation
Mahdi Hajlaoui, E. Papalazarou, Julien Mauchain, Luca Perfetti, Amina Taleb-Ibrahimi, et al.. Tuning a Schottky barrier in a photoexcited topological insulator with transient Dirac cone electron-hole asymmetry. Nature, Nature Publishing Group, 2014, 5, pp.3003. ⟨10.1038/ncomms4003⟩. ⟨hal-01011937⟩
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