Evidence for a quantum spin Hall phase in graphene decorated with Bi2Te3 nanoparticles
Abstract
Realization of the quantum spin Hall effect in graphene devices has remained an outstanding challenge dating back to the inception of the field of topological insulators. Graphene’s exceptionally weak spin-orbit coupling—stemming from carbon’s low mass—poses the primary obstacle. We experimentally and theoretically study artificially enhanced spin-orbit coupling in graphene via random decoration with dilute Bi2Te3 nanoparticles. Multiterminal resistance measurements suggest the presence of helical edge states characteristic of a quantum spin Hall phase; the magnetic field and temperature dependence of the resistance peaks, x-ray photoelectron spectra, scanning tunneling spectroscopy, and first-principles calculations further support this scenario. These observations highlight a pathway to spintronics and quantum information applications in graphene-based quantum spin Hall platforms.
- Authors:
-
[1];
[3];
[4]
- Aoyama Gakuin Univ., Kanagawa (Japan)
- The Univ. of Tokyo, Chiba (Japan)
- Univ. of California, Irvine, CA (United States)
- Aoyama Gakuin Univ., Kanagawa (Japan); The Univ. of Tokyo, Chiba (Japan)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Irvine, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1544001
- Grant/Contract Number:
- FG02-05ER46237
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Science Advances
- Additional Journal Information:
- Journal Volume: 4; Journal Issue: 11; Journal ID: ISSN 2375-2548
- Publisher:
- AAAS
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Science & Technology; Other Topics
Citation Formats
Hatsuda, K., Mine, H., Nakamura, T., Li, J., Wu, R., Katsumoto, S., and Haruyama, J. Evidence for a quantum spin Hall phase in graphene decorated with Bi2Te3 nanoparticles. United States: N. p., 2018.
Web. doi:10.1126/sciadv.aau6915.
Hatsuda, K., Mine, H., Nakamura, T., Li, J., Wu, R., Katsumoto, S., & Haruyama, J. Evidence for a quantum spin Hall phase in graphene decorated with Bi2Te3 nanoparticles. United States. https://doi.org/10.1126/sciadv.aau6915
Hatsuda, K., Mine, H., Nakamura, T., Li, J., Wu, R., Katsumoto, S., and Haruyama, J. Fri .
"Evidence for a quantum spin Hall phase in graphene decorated with Bi2Te3 nanoparticles". United States. https://doi.org/10.1126/sciadv.aau6915. https://www.osti.gov/servlets/purl/1544001.
@article{osti_1544001,
title = {Evidence for a quantum spin Hall phase in graphene decorated with Bi2Te3 nanoparticles},
author = {Hatsuda, K. and Mine, H. and Nakamura, T. and Li, J. and Wu, R. and Katsumoto, S. and Haruyama, J.},
abstractNote = {Realization of the quantum spin Hall effect in graphene devices has remained an outstanding challenge dating back to the inception of the field of topological insulators. Graphene’s exceptionally weak spin-orbit coupling—stemming from carbon’s low mass—poses the primary obstacle. We experimentally and theoretically study artificially enhanced spin-orbit coupling in graphene via random decoration with dilute Bi2Te3 nanoparticles. Multiterminal resistance measurements suggest the presence of helical edge states characteristic of a quantum spin Hall phase; the magnetic field and temperature dependence of the resistance peaks, x-ray photoelectron spectra, scanning tunneling spectroscopy, and first-principles calculations further support this scenario. These observations highlight a pathway to spintronics and quantum information applications in graphene-based quantum spin Hall platforms.},
doi = {10.1126/sciadv.aau6915},
journal = {Science Advances},
number = 11,
volume = 4,
place = {United States},
year = {Fri Nov 09 00:00:00 EST 2018},
month = {Fri Nov 09 00:00:00 EST 2018}
}
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