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Title: Low-Temperature Thermopower in CoSbS

Abstract

Here, we report on giant thermopower of S = 2.5 mV/K in CoSbS single crystals: a material that shows strong high-temperature thermoelectric performance when doped with Ni or Se. Changes of low-temperature thermopower induced by a magnetic field point to the mechanism of electronic diffusion of carriers in the heavy valence band. Intrinsic magnetic susceptibility is consistent with the Kondo-insulatorlike accumulation of electronic states around the gap edges. This suggests that giant thermopower stems from temperature-dependent renormalization of the noninteracting bands and buildup of the electronic correlations on cooling.

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Stony Brook Univ., NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Rutgers Univ., Piscataway, NJ (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1570672
Alternate Identifier(s):
OSTI ID: 1567981
Report Number(s):
BNL-212195-2019-JAAM
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 123; Journal Issue: 7; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Du, Qianheng, Abeykoon, Milinda, Liu, Yu, Kotliar, G., and Petrovic, C. Low-Temperature Thermopower in CoSbS. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.123.076602.
Du, Qianheng, Abeykoon, Milinda, Liu, Yu, Kotliar, G., & Petrovic, C. Low-Temperature Thermopower in CoSbS. United States. doi:10.1103/PhysRevLett.123.076602.
Du, Qianheng, Abeykoon, Milinda, Liu, Yu, Kotliar, G., and Petrovic, C. Fri . "Low-Temperature Thermopower in CoSbS". United States. doi:10.1103/PhysRevLett.123.076602.
@article{osti_1570672,
title = {Low-Temperature Thermopower in CoSbS},
author = {Du, Qianheng and Abeykoon, Milinda and Liu, Yu and Kotliar, G. and Petrovic, C.},
abstractNote = {Here, we report on giant thermopower of S = 2.5 mV/K in CoSbS single crystals: a material that shows strong high-temperature thermoelectric performance when doped with Ni or Se. Changes of low-temperature thermopower induced by a magnetic field point to the mechanism of electronic diffusion of carriers in the heavy valence band. Intrinsic magnetic susceptibility is consistent with the Kondo-insulatorlike accumulation of electronic states around the gap edges. This suggests that giant thermopower stems from temperature-dependent renormalization of the noninteracting bands and buildup of the electronic correlations on cooling.},
doi = {10.1103/PhysRevLett.123.076602},
journal = {Physical Review Letters},
number = 7,
volume = 123,
place = {United States},
year = {2019},
month = {8}
}

Journal Article:
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