Hall-coefficient diagnostics of the surface state in pressurized SmB6
Abstract
In this study, we report results of the high-pressure Hall coefficient (RH) measurements in the putative topological Kondo insulator SmB6 up to 37 GPa. Below 10 GPa, our data reveal that RH(T) exhibits a prominent peak upon cooling below 20 K. Remarkably, the temperature at which surface conduction dominates coincides with the temperature of the peak in RH(T). The temperature dependent resistance and Hall coefficient can be well fitted by a two-channel model with contributions from the metallic surface and the thermally activated bulk states. When the bulk of SmB6 becomes metallic and magnetic at ~10 GPa, both the RH(T) peak and the resistance plateau disappear simultaneously. Here, our results indicate that the RH(T) peak is a fingerprint to diagnose the presence of a metallic surface state in SmB6. The high-pressure magnetic state of SmB6 is robust to 180 GPa, and no evidence of superconductivity is observed in the metallic phase.
- Authors:
-
[1];
[2];
- Chinese Academy of Sciences (CAS), Beijing (China)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of California, Irvine, CA (United States)
- Renmin Univ. of China, Beijing (China)
- Chinese Academy of Sciences (CAS), Shanghai (China)
- Rice Univ., Houston, TX (United States)
- Chinese Academy of Sciences (CAS), Beijing (China); Songshan Lake Materials Lab., Guangdong (China)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; US Army Research Office (ARO); National Key Research and Development Program of China; National Science Foundation (NSF); Chinese Academy of Sciences; Robert A. Welch Foundation; USDOE
- OSTI Identifier:
- 1812679
- Alternate Identifier(s):
- OSTI ID: 1605495
- Report Number(s):
- LA-UR-21-24339
Journal ID: ISSN 2469-9950; TRN: US2213271
- Grant/Contract Number:
- 89233218CNA000001; W911NF-14-1-0525; 2016YFA0300300; 2017YFA0302900; 2017YFA0303103; 91321207; 11427805; U1532267; 11604376; 11374361; 11522435; XDB07020300; C-1411
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B
- Additional Journal Information:
- Journal Volume: 101; Journal Issue: 12; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Material Science
Citation Formats
Zhou, Yazhou, Rosa, Priscila F. S., Guo, Jing, Cai, Shu, Yu, Rong, Jiang, Sheng, Yang, Ke, Li, Aiguo, Si, Qimiao, Wu, Qi, Fisk, Zachary, and Sun, Liling. Hall-coefficient diagnostics of the surface state in pressurized SmB6. United States: N. p., 2020.
Web. doi:10.1103/physrevb.101.125116.
Zhou, Yazhou, Rosa, Priscila F. S., Guo, Jing, Cai, Shu, Yu, Rong, Jiang, Sheng, Yang, Ke, Li, Aiguo, Si, Qimiao, Wu, Qi, Fisk, Zachary, & Sun, Liling. Hall-coefficient diagnostics of the surface state in pressurized SmB6. United States. https://doi.org/10.1103/physrevb.101.125116
Zhou, Yazhou, Rosa, Priscila F. S., Guo, Jing, Cai, Shu, Yu, Rong, Jiang, Sheng, Yang, Ke, Li, Aiguo, Si, Qimiao, Wu, Qi, Fisk, Zachary, and Sun, Liling. Thu .
"Hall-coefficient diagnostics of the surface state in pressurized SmB6". United States. https://doi.org/10.1103/physrevb.101.125116. https://www.osti.gov/servlets/purl/1812679.
@article{osti_1812679,
title = {Hall-coefficient diagnostics of the surface state in pressurized SmB6},
author = {Zhou, Yazhou and Rosa, Priscila F. S. and Guo, Jing and Cai, Shu and Yu, Rong and Jiang, Sheng and Yang, Ke and Li, Aiguo and Si, Qimiao and Wu, Qi and Fisk, Zachary and Sun, Liling},
abstractNote = {In this study, we report results of the high-pressure Hall coefficient (RH) measurements in the putative topological Kondo insulator SmB6 up to 37 GPa. Below 10 GPa, our data reveal that RH(T) exhibits a prominent peak upon cooling below 20 K. Remarkably, the temperature at which surface conduction dominates coincides with the temperature of the peak in RH(T). The temperature dependent resistance and Hall coefficient can be well fitted by a two-channel model with contributions from the metallic surface and the thermally activated bulk states. When the bulk of SmB6 becomes metallic and magnetic at ~10 GPa, both the RH(T) peak and the resistance plateau disappear simultaneously. Here, our results indicate that the RH(T) peak is a fingerprint to diagnose the presence of a metallic surface state in SmB6. The high-pressure magnetic state of SmB6 is robust to 180 GPa, and no evidence of superconductivity is observed in the metallic phase.},
doi = {10.1103/physrevb.101.125116},
journal = {Physical Review. B},
number = 12,
volume = 101,
place = {United States},
year = {Thu Mar 19 00:00:00 EDT 2020},
month = {Thu Mar 19 00:00:00 EDT 2020}
}
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