Electronic structure, transport, and phonons of SrAgChF (Ch = S,Se,Te): Bulk superlattice thermoelectrics
Abstract
Here, we report calculations of the electronic structure, vibrational properties, and transport for the p-type semiconductors, SrAgChF (Ch = S, Se, and Te). We find soft phonons with low frequency optical branches intersecting the acoustic modes below 50 cm–1, indicative of a material with low thermal conductivity. The bands at and near the valence-band maxima are highly two-dimensional, which leads to high thermopowers even at high carrier concentrations, which is a combination that suggests good thermoelectric performance. These materials may be regarded as bulk realizations of superlattice thermoelectrics.
- Authors:
-
- Indian Institute of Technology Hyderabad, Telangana (India)
- Univ. of Hyderabad, Telangana (India)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Aarhus Univ., Aarhus (Denmark)
- Michigan State Univ., East Lansing, MI (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Energy Frontier Research Centers (EFRC) (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1195812
- Alternate Identifier(s):
- OSTI ID: 1194832
- Grant/Contract Number:
- AC05-00OR22725; SC0001299; FG02-09ER46577
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B, Condensed Matter and Materials Physics
- Additional Journal Information:
- Journal Volume: 92; Journal Issue: 4; Journal ID: ISSN 1098-0121
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Gudelli, Vijay Kumar, Kanchana, V., Vaitheeswaran, G., Singh, David J., Svane, Axel, Christensen, Niels Egede, and Mahanti, Subhendra D. Electronic structure, transport, and phonons of SrAgChF (Ch = S,Se,Te): Bulk superlattice thermoelectrics. United States: N. p., 2015.
Web. doi:10.1103/PhysRevB.92.045206.
Gudelli, Vijay Kumar, Kanchana, V., Vaitheeswaran, G., Singh, David J., Svane, Axel, Christensen, Niels Egede, & Mahanti, Subhendra D. Electronic structure, transport, and phonons of SrAgChF (Ch = S,Se,Te): Bulk superlattice thermoelectrics. United States. https://doi.org/10.1103/PhysRevB.92.045206
Gudelli, Vijay Kumar, Kanchana, V., Vaitheeswaran, G., Singh, David J., Svane, Axel, Christensen, Niels Egede, and Mahanti, Subhendra D. Wed .
"Electronic structure, transport, and phonons of SrAgChF (Ch = S,Se,Te): Bulk superlattice thermoelectrics". United States. https://doi.org/10.1103/PhysRevB.92.045206. https://www.osti.gov/servlets/purl/1195812.
@article{osti_1195812,
title = {Electronic structure, transport, and phonons of SrAgChF (Ch = S,Se,Te): Bulk superlattice thermoelectrics},
author = {Gudelli, Vijay Kumar and Kanchana, V. and Vaitheeswaran, G. and Singh, David J. and Svane, Axel and Christensen, Niels Egede and Mahanti, Subhendra D.},
abstractNote = {Here, we report calculations of the electronic structure, vibrational properties, and transport for the p-type semiconductors, SrAgChF (Ch = S, Se, and Te). We find soft phonons with low frequency optical branches intersecting the acoustic modes below 50 cm–1, indicative of a material with low thermal conductivity. The bands at and near the valence-band maxima are highly two-dimensional, which leads to high thermopowers even at high carrier concentrations, which is a combination that suggests good thermoelectric performance. These materials may be regarded as bulk realizations of superlattice thermoelectrics.},
doi = {10.1103/PhysRevB.92.045206},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 4,
volume = 92,
place = {United States},
year = {Wed Jul 15 00:00:00 EDT 2015},
month = {Wed Jul 15 00:00:00 EDT 2015}
}
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