Weak Anti-localization and Quantum Oscillations of Surface States in Topological Insulator Bi2Se2Te
Abstract
Topological insulators, a new quantum state of matter, create exciting opportunities for studying topological quantum physics and for exploring spintronic applications due to their gapless helical metallic surface states. Here, we report the observation of weak anti-localization and quantum oscillations originated from surface states in Bi2Se2Te crystals. Angle-resolved photoemission spectroscopy measurements on cleaved Bi2Se2Te crystals show a well-defined linear dispersion without intersection of the conduction band. The measured weak anti-localization effect agrees well with the Hikami-Larkin-Nagaoka model and the extracted phase coherent length shows a power-law dependence with temperature (lw,T20.44), indicating the presence of the surface states. More importantly, the analysis of a Landau-level fan diagram of Shubnikov-de Hass oscillations yields a finite Berry phase of ,0.42p, suggesting the Dirac nature of the surface states. Our results demonstrate that Bi2Se2Te can serve as a suitable topological insulator candidate for achieving intrinsic quantum transport of surface Dirac fermions.
- Authors:
-
- Iowa State Univ., Ames, IA (United States). Dept. of Electrical and Computer Engineering
- Univ. of California, Los Angeles, CA (United States). Dept. of Electrical Engineering
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Univ. of Queensland, Brisbane, QLD (Australia). Center for Microscopy and Microanalysis. Materials Engineering
- Ames Lab., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1624578
- Grant/Contract Number:
- AC02-05CH11231; AC02-07CH11358
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 2; Journal Issue: 1; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Science & Technology - Other Topics; CONDENSED-MATTER PHYSICS; APPLIED PHYSICS; PHYSICS; MATERIALS SCIENCE
Citation Formats
Bao, Lihong, He, Liang, Meyer, Nicholas, Kou, Xufeng, Zhang, Peng, Chen, Zhi-gang, Fedorov, Alexei V., Zou, Jin, Riedemann, Trevor M., Lograsso, Thomas A., Wang, Kang L., Tuttle, Gary, and Xiu, Faxian. Weak Anti-localization and Quantum Oscillations of Surface States in Topological Insulator Bi2Se2Te. United States: N. p., 2012.
Web. doi:10.1038/srep00726.
Bao, Lihong, He, Liang, Meyer, Nicholas, Kou, Xufeng, Zhang, Peng, Chen, Zhi-gang, Fedorov, Alexei V., Zou, Jin, Riedemann, Trevor M., Lograsso, Thomas A., Wang, Kang L., Tuttle, Gary, & Xiu, Faxian. Weak Anti-localization and Quantum Oscillations of Surface States in Topological Insulator Bi2Se2Te. United States. https://doi.org/10.1038/srep00726
Bao, Lihong, He, Liang, Meyer, Nicholas, Kou, Xufeng, Zhang, Peng, Chen, Zhi-gang, Fedorov, Alexei V., Zou, Jin, Riedemann, Trevor M., Lograsso, Thomas A., Wang, Kang L., Tuttle, Gary, and Xiu, Faxian. Thu .
"Weak Anti-localization and Quantum Oscillations of Surface States in Topological Insulator Bi2Se2Te". United States. https://doi.org/10.1038/srep00726. https://www.osti.gov/servlets/purl/1624578.
@article{osti_1624578,
title = {Weak Anti-localization and Quantum Oscillations of Surface States in Topological Insulator Bi2Se2Te},
author = {Bao, Lihong and He, Liang and Meyer, Nicholas and Kou, Xufeng and Zhang, Peng and Chen, Zhi-gang and Fedorov, Alexei V. and Zou, Jin and Riedemann, Trevor M. and Lograsso, Thomas A. and Wang, Kang L. and Tuttle, Gary and Xiu, Faxian},
abstractNote = {Topological insulators, a new quantum state of matter, create exciting opportunities for studying topological quantum physics and for exploring spintronic applications due to their gapless helical metallic surface states. Here, we report the observation of weak anti-localization and quantum oscillations originated from surface states in Bi2Se2Te crystals. Angle-resolved photoemission spectroscopy measurements on cleaved Bi2Se2Te crystals show a well-defined linear dispersion without intersection of the conduction band. The measured weak anti-localization effect agrees well with the Hikami-Larkin-Nagaoka model and the extracted phase coherent length shows a power-law dependence with temperature (lw,T20.44), indicating the presence of the surface states. More importantly, the analysis of a Landau-level fan diagram of Shubnikov-de Hass oscillations yields a finite Berry phase of ,0.42p, suggesting the Dirac nature of the surface states. Our results demonstrate that Bi2Se2Te can serve as a suitable topological insulator candidate for achieving intrinsic quantum transport of surface Dirac fermions.},
doi = {10.1038/srep00726},
journal = {Scientific Reports},
number = 1,
volume = 2,
place = {United States},
year = {Thu Oct 11 00:00:00 EDT 2012},
month = {Thu Oct 11 00:00:00 EDT 2012}
}
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