Abstract

Despite intensive investigations of Bi2Se3 in past few years, the size and nature of the bulk energy band gap of this well-known 3D topological insulator still remain unclear. Here we report on a combined magneto-transport, photoluminescence and infrared transmission study of Bi2Se3, which unambiguously shows that the energy band gap of this material is direct and reaches Eg = (220 ± 5) meV at low temperatures.

Details

Title
Determination of the energy band gap of Bi2Se3
Author
Martinez, G 1 ; Piot, B A 1 ; Hakl, M 1 ; Potemski, M 1 ; Hor, Y S 2 ; Materna, A 3 ; Strzelecka, S G 3 ; Hruban, A 4 ; Caha, O 5 ; Novák, J 5 ; Dubroka, A 5 ; Drašar, Č 6 ; Orlita, M 7 

 Laboratoire National des Champs Magnétiques Intenses, CNRS-UGA-UPS-INSA-EMFL, Grenoble, France 
 Department of Physics, Missouri University of Science and Technology, Rolla, USA 
 Institute of Electronic Materials Technology, Warsaw, Poland 
 Institute of Electronic Materials Technology, Warsaw, Poland; Institute of Physics, Polish Academy of Science, Warsaw, Poland 
 CEITEC MU, Masaryk University, Faculty of Science, Brno, Czech Republic 
 Institute of Applied Physics and Mathematics, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic 
 Laboratoire National des Champs Magnétiques Intenses, CNRS-UGA-UPS-INSA-EMFL, Grenoble, France; Institute of Physics, Charles University in Prague, Prague, Czech Republic 
Pages
1-5
Publication year
2017
Publication date
Jul 2017
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
1957127952
Copyright
© 2017. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.