Crystal size effects on giant thermopower in
Abstract
Here, we have examined size effect on thermal, transport, and thermodynamic properties of a CrSb 2 single crystal. We demonstrate highly anisotropic quasi-one-dimensional electrical conductivity, quasiballistic phonons, and giant thermopower of -6 mV/K at 15 K. A thermopower peak is suppressed to -1.6 mV/K by changing crystal dimensions and shows linear dependence on the phonon mean-free path. Whereas electronic diffusion thermopower is significant, the bulk of the giant thermopower in CrSb2 stems from the coupling of the very long mean-free path phonons with the in-gap states.
- Authors:
-
[1];
[1]
- Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- 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:
- 1607980
- Report Number(s):
- BNL-213792-2020-JAAM
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US2105003
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 101; Journal Issue: 3; 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; electrical conductivity; Hall effect; lattice thermal conductivity; seebeck effect; specific heat; thermal conductivity; Kondo insulators; semiconductors; thermoelectric systems
Citation Formats
Du, Qianheng, Guzman, David, Choi, Sangkook, and Petrovic, Cedomir. Crystal size effects on giant thermopower in CrSb2. United States: N. p., 2020.
Web. doi:10.1103/PhysRevB.101.035125.
Du, Qianheng, Guzman, David, Choi, Sangkook, & Petrovic, Cedomir. Crystal size effects on giant thermopower in CrSb2. United States. https://doi.org/10.1103/PhysRevB.101.035125
Du, Qianheng, Guzman, David, Choi, Sangkook, and Petrovic, Cedomir. Thu .
"Crystal size effects on giant thermopower in CrSb2". United States. https://doi.org/10.1103/PhysRevB.101.035125. https://www.osti.gov/servlets/purl/1607980.
@article{osti_1607980,
title = {Crystal size effects on giant thermopower in CrSb2},
author = {Du, Qianheng and Guzman, David and Choi, Sangkook and Petrovic, Cedomir},
abstractNote = {Here, we have examined size effect on thermal, transport, and thermodynamic properties of a CrSb 2 single crystal. We demonstrate highly anisotropic quasi-one-dimensional electrical conductivity, quasiballistic phonons, and giant thermopower of -6 mV/K at 15 K. A thermopower peak is suppressed to -1.6 mV/K by changing crystal dimensions and shows linear dependence on the phonon mean-free path. Whereas electronic diffusion thermopower is significant, the bulk of the giant thermopower in CrSb2 stems from the coupling of the very long mean-free path phonons with the in-gap states.},
doi = {10.1103/PhysRevB.101.035125},
journal = {Physical Review B},
number = 3,
volume = 101,
place = {United States},
year = {Thu Jan 16 00:00:00 EST 2020},
month = {Thu Jan 16 00:00:00 EST 2020}
}
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