Electronic structure, irreversibility line and magnetoresistance of Cu0.3Bi2Se3 superconductor
Abstract
CuxBi2Se3 is a superconductor that is a potential candidate for topological superconductors. We report our laser-based angle-resolved photoemission measurement on the electronic structure of the CuxBi2Se3 superconductor, and a detailed magneto-resistance measurement in both normal and superconducting states. We find that the topological surface state of the pristine Bi2Se3 topological insulator remains robust after the Cu-intercalation, while the Dirac cone location moves downward due to electron doping. Detailed measurements on the magnetic field-dependence of the resistance in the superconducting state establishes an irreversibility line and gives a value of the upper critical field at zero temperature of ~4000 Oe for the Cu0.3Bi2Se3 superconductor with a middle point Tc of 1.9K. The relation between the upper critical field Hc2 and temperature T is different from the usual scaling relation found in cuprates and in other kinds of superconductors. Small positive magneto-resistance is observed in Cu0.3Bi2Se3 superconductors up to room temperature. As a result, these observations provide useful information for further study of this possible candidate for topological superconductors.
- Authors:
-
- Chinese Academy of Sciences (CAS), Beijing (China)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1226053
- Report Number(s):
- BNL-108429-2015-JA
Journal ID: ISSN 0256-307X; R&D Project: PO010; KC0201060
- Grant/Contract Number:
- SC00112704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Chinese Physics Letters
- Additional Journal Information:
- Journal Volume: 32; Journal Issue: 6; Journal ID: ISSN 0256-307X
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Hemian, Yi, Gu, Genda, Chen, Chao -Yu, Sun, Xuan, Xie, Zhuo -Jin, Feng, Ya, Liang, Ai -Ji, Peng, Ying -Ying, He, Shao -Long, Zhao, Lin, Liu, Guo -Dong, Dong, Xiao -Li, Zhang, Jun, Chen, Chuang -Tian, Xu, Zu -Yan, and Zhou, X. -J. Electronic structure, irreversibility line and magnetoresistance of Cu0.3Bi2Se3 superconductor. United States: N. p., 2015.
Web. doi:10.1088/0256-307X/32/6/067401.
Hemian, Yi, Gu, Genda, Chen, Chao -Yu, Sun, Xuan, Xie, Zhuo -Jin, Feng, Ya, Liang, Ai -Ji, Peng, Ying -Ying, He, Shao -Long, Zhao, Lin, Liu, Guo -Dong, Dong, Xiao -Li, Zhang, Jun, Chen, Chuang -Tian, Xu, Zu -Yan, & Zhou, X. -J. Electronic structure, irreversibility line and magnetoresistance of Cu0.3Bi2Se3 superconductor. United States. https://doi.org/10.1088/0256-307X/32/6/067401
Hemian, Yi, Gu, Genda, Chen, Chao -Yu, Sun, Xuan, Xie, Zhuo -Jin, Feng, Ya, Liang, Ai -Ji, Peng, Ying -Ying, He, Shao -Long, Zhao, Lin, Liu, Guo -Dong, Dong, Xiao -Li, Zhang, Jun, Chen, Chuang -Tian, Xu, Zu -Yan, and Zhou, X. -J. Mon .
"Electronic structure, irreversibility line and magnetoresistance of Cu0.3Bi2Se3 superconductor". United States. https://doi.org/10.1088/0256-307X/32/6/067401. https://www.osti.gov/servlets/purl/1226053.
@article{osti_1226053,
title = {Electronic structure, irreversibility line and magnetoresistance of Cu0.3Bi2Se3 superconductor},
author = {Hemian, Yi and Gu, Genda and Chen, Chao -Yu and Sun, Xuan and Xie, Zhuo -Jin and Feng, Ya and Liang, Ai -Ji and Peng, Ying -Ying and He, Shao -Long and Zhao, Lin and Liu, Guo -Dong and Dong, Xiao -Li and Zhang, Jun and Chen, Chuang -Tian and Xu, Zu -Yan and Zhou, X. -J.},
abstractNote = {CuxBi2Se3 is a superconductor that is a potential candidate for topological superconductors. We report our laser-based angle-resolved photoemission measurement on the electronic structure of the CuxBi2Se3 superconductor, and a detailed magneto-resistance measurement in both normal and superconducting states. We find that the topological surface state of the pristine Bi2Se3 topological insulator remains robust after the Cu-intercalation, while the Dirac cone location moves downward due to electron doping. Detailed measurements on the magnetic field-dependence of the resistance in the superconducting state establishes an irreversibility line and gives a value of the upper critical field at zero temperature of ~4000 Oe for the Cu0.3Bi2Se3 superconductor with a middle point Tc of 1.9K. The relation between the upper critical field Hc2 and temperature T is different from the usual scaling relation found in cuprates and in other kinds of superconductors. Small positive magneto-resistance is observed in Cu0.3Bi2Se3 superconductors up to room temperature. As a result, these observations provide useful information for further study of this possible candidate for topological superconductors.},
doi = {10.1088/0256-307X/32/6/067401},
journal = {Chinese Physics Letters},
number = 6,
volume = 32,
place = {United States},
year = {Mon Jun 01 00:00:00 EDT 2015},
month = {Mon Jun 01 00:00:00 EDT 2015}
}
Web of Science
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