Ingredients for enhanced thermoelectric power at cryotemperatures in the correlated semiconductor CoSbS revealed by its optical response
Abstract
The semiconducting CoSbS is well-known for its thermoelectric performance at high-temperatures but it is also of interest because of its colossal low-temperature thermopower. Here, we address the temperature dependence of its optical response over a broad spectral range, from which we reveal several ingredients determining the thermoelectric properties at cryo-temperatures. Furthermore, we discover co- herent phonon modes and with the additional support of scanning transmission electron microscopy investigations we provide evidences for in-gap impurity states driving the formation of correlated electrons in the valence band. Their implications, with respect to the high thermoelectric power at low temperatures, are discussed within the framework of the phonon-drag transport of low-mobility heavy quasiparticles.
- Authors:
-
[1];
[1];
[2];
[3];
[4];
[1]
- ETH Zurich (Switzerland). Lab. für Festkörperphysik
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States); Argonne National Lab. (ANL), Lemont, IL (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., 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). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1785115
- Report Number(s):
- BNL-221541-2021-JAAM
Journal ID: ISSN 2469-9950; TRN: US2210255
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 103; Journal Issue: 16; 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; optical phonons; thermopower; strongly correlated systems; optical spectroscopy; transmission electron microscopy
Citation Formats
Yang, R., Corasaniti, M., Wu, L., Du, Q., Zhu, Y., Petrovic, C., and Degiorgi, L. Ingredients for enhanced thermoelectric power at cryotemperatures in the correlated semiconductor CoSbS revealed by its optical response. United States: N. p., 2021.
Web. doi:10.1103/physrevb.103.l161111.
Yang, R., Corasaniti, M., Wu, L., Du, Q., Zhu, Y., Petrovic, C., & Degiorgi, L. Ingredients for enhanced thermoelectric power at cryotemperatures in the correlated semiconductor CoSbS revealed by its optical response. United States. https://doi.org/10.1103/physrevb.103.l161111
Yang, R., Corasaniti, M., Wu, L., Du, Q., Zhu, Y., Petrovic, C., and Degiorgi, L. Fri .
"Ingredients for enhanced thermoelectric power at cryotemperatures in the correlated semiconductor CoSbS revealed by its optical response". United States. https://doi.org/10.1103/physrevb.103.l161111. https://www.osti.gov/servlets/purl/1785115.
@article{osti_1785115,
title = {Ingredients for enhanced thermoelectric power at cryotemperatures in the correlated semiconductor CoSbS revealed by its optical response},
author = {Yang, R. and Corasaniti, M. and Wu, L. and Du, Q. and Zhu, Y. and Petrovic, C. and Degiorgi, L.},
abstractNote = {The semiconducting CoSbS is well-known for its thermoelectric performance at high-temperatures but it is also of interest because of its colossal low-temperature thermopower. Here, we address the temperature dependence of its optical response over a broad spectral range, from which we reveal several ingredients determining the thermoelectric properties at cryo-temperatures. Furthermore, we discover co- herent phonon modes and with the additional support of scanning transmission electron microscopy investigations we provide evidences for in-gap impurity states driving the formation of correlated electrons in the valence band. Their implications, with respect to the high thermoelectric power at low temperatures, are discussed within the framework of the phonon-drag transport of low-mobility heavy quasiparticles.},
doi = {10.1103/physrevb.103.l161111},
journal = {Physical Review B},
number = 16,
volume = 103,
place = {United States},
year = {Fri Apr 23 00:00:00 EDT 2021},
month = {Fri Apr 23 00:00:00 EDT 2021}
}
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