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Title: Simultaneous detection of quantum oscillations from bulk and topological surface states in metallic Bi 2Se 2.1Te 0.9

Abstract

Here, Shubnikov-de Haas (SdH) oscillations in metallic Bi 2Se 2.1Te 0.9 are studied in magnetic fields up to 35 Tesla. It is demonstrated that two characteristic frequencies determine the quantum oscillations of the conductivity. Angle dependent measurements and calculations of the Berry phase show that the two frequencies F 1 and F 2 describe oscillations from surface and bulk carriers, respectively. At low magnetic fields, only SdH oscillation from topological surface states can be detected whereas at high magnetic field the bulk oscillations dominate. The origin of the separation of bulk and surface SdH oscillations into different magnetic field ranges is revealed in the difference of the cyclotron masses m c. The bulk m c is nearly three times larger than the surface cyclotron mass resulting in a stronger attenuation of the bulk oscillation amplitude upon decreasing magnetic field. This makes it possible to detect and characterize the surface SdH oscillations in the low-field range and the bulk oscillations at high magnetic fields.

Authors:
 [1];  [2];  [3];  [4];  [5]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  2. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
  3. Bulgarian Academy of Sciences, Sofia (Bulgaria). Inst. of Optical Materials and Technology
  4. Univ. of Houston, Houston, TX (United States). Texas Center for Superconductivity (TCSUH) and Dept. of Physics
  5. Univ. of Houston, Houston, TX (United States). Texas Center for Superconductivity (TCSUH) and Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; T.L.L. Temple Foundation; John J. and Rebecca Moores Endowment; US Air Force Office of Scientific Research (AFOSR); Bulgaria National Science Fund (BNSF); National Science Foundation (NSF)
OSTI Identifier:
1402502
Report Number(s):
INL/JOU-17-41576
Journal ID: ISSN 1478-6435
Grant/Contract Number:  
AC07-05ID14517; FA9550-15-1-0236; FNI-T-02/26; DMR-1157490; FG02-01ER45872
Resource Type:
Accepted Manuscript
Journal Name:
Philosophical Magazine (2003, Print)
Additional Journal Information:
Journal Name: Philosophical Magazine (2003, Print); Journal Volume: 97; Journal Issue: 20; Journal ID: ISSN 1478-6435
Publisher:
Taylor & Francis
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; High Magnetic Fields; Quantum Oscillations; topological insulator; Shubnikov-de Haas oscillations; surface states; bulk states

Citation Formats

Shrestha, Keshav, Graf, David E., Marinova, Vera, Lorenz, Bernd, and Chu, Paul C. W. Simultaneous detection of quantum oscillations from bulk and topological surface states in metallic Bi2Se2.1Te0.9. United States: N. p., 2017. Web. doi:10.1080/14786435.2017.1314563.
Shrestha, Keshav, Graf, David E., Marinova, Vera, Lorenz, Bernd, & Chu, Paul C. W. Simultaneous detection of quantum oscillations from bulk and topological surface states in metallic Bi2Se2.1Te0.9. United States. doi:10.1080/14786435.2017.1314563.
Shrestha, Keshav, Graf, David E., Marinova, Vera, Lorenz, Bernd, and Chu, Paul C. W. Wed . "Simultaneous detection of quantum oscillations from bulk and topological surface states in metallic Bi2Se2.1Te0.9". United States. doi:10.1080/14786435.2017.1314563. https://www.osti.gov/servlets/purl/1402502.
@article{osti_1402502,
title = {Simultaneous detection of quantum oscillations from bulk and topological surface states in metallic Bi2Se2.1Te0.9},
author = {Shrestha, Keshav and Graf, David E. and Marinova, Vera and Lorenz, Bernd and Chu, Paul C. W.},
abstractNote = {Here, Shubnikov-de Haas (SdH) oscillations in metallic Bi2Se2.1Te0.9 are studied in magnetic fields up to 35 Tesla. It is demonstrated that two characteristic frequencies determine the quantum oscillations of the conductivity. Angle dependent measurements and calculations of the Berry phase show that the two frequencies F1 and F2 describe oscillations from surface and bulk carriers, respectively. At low magnetic fields, only SdH oscillation from topological surface states can be detected whereas at high magnetic field the bulk oscillations dominate. The origin of the separation of bulk and surface SdH oscillations into different magnetic field ranges is revealed in the difference of the cyclotron masses mc. The bulk mc is nearly three times larger than the surface cyclotron mass resulting in a stronger attenuation of the bulk oscillation amplitude upon decreasing magnetic field. This makes it possible to detect and characterize the surface SdH oscillations in the low-field range and the bulk oscillations at high magnetic fields.},
doi = {10.1080/14786435.2017.1314563},
journal = {Philosophical Magazine (2003, Print)},
number = 20,
volume = 97,
place = {United States},
year = {2017},
month = {4}
}

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