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Title: Thermoelectric properties of MBE-grown HgCdTe-based superlattices from 100K to 300K

Abstract

This paper reports on the thermoelectric properties of long-period HgCdTe superlattices (MCT SLs) from cryogenic temperature to room temperature. We find that the thermal conductivity is lower than the alloy value especially at low temperatures, the electrical conductivity is similar to that of alloy films, and the Seebeck coefficient is comparable to other SLs. Calculations based on Rytov’s elastic model show that the phonon group velocity is reduced due to folding by more than a factor of two relative to its value in bulk CdTe or HgTe. Thermal conductivity is found to be relatively constant over a wide range of temperatures.

Authors:
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Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Center for Solar and Thermal Energy Conversion (CSTEC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1263683
Alternate Identifier(s):
OSTI ID: 1370114; OSTI ID: 1421198
Grant/Contract Number:  
SC0000957
Resource Type:
Published Article
Journal Name:
AIP Advances
Additional Journal Information:
Journal Name: AIP Advances Journal Volume: 6 Journal Issue: 7; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Zhang, Kejia, Yadav, Abhishek, Shao, Lei, Bommena, Ramana, Zhao, Jun, Velicu, Silviu, and Pipe, Kevin P. Thermoelectric properties of MBE-grown HgCdTe-based superlattices from 100K to 300K. United States: N. p., 2016. Web. doi:10.1063/1.4959159.
Zhang, Kejia, Yadav, Abhishek, Shao, Lei, Bommena, Ramana, Zhao, Jun, Velicu, Silviu, & Pipe, Kevin P. Thermoelectric properties of MBE-grown HgCdTe-based superlattices from 100K to 300K. United States. doi:10.1063/1.4959159.
Zhang, Kejia, Yadav, Abhishek, Shao, Lei, Bommena, Ramana, Zhao, Jun, Velicu, Silviu, and Pipe, Kevin P. Fri . "Thermoelectric properties of MBE-grown HgCdTe-based superlattices from 100K to 300K". United States. doi:10.1063/1.4959159.
@article{osti_1263683,
title = {Thermoelectric properties of MBE-grown HgCdTe-based superlattices from 100K to 300K},
author = {Zhang, Kejia and Yadav, Abhishek and Shao, Lei and Bommena, Ramana and Zhao, Jun and Velicu, Silviu and Pipe, Kevin P.},
abstractNote = {This paper reports on the thermoelectric properties of long-period HgCdTe superlattices (MCT SLs) from cryogenic temperature to room temperature. We find that the thermal conductivity is lower than the alloy value especially at low temperatures, the electrical conductivity is similar to that of alloy films, and the Seebeck coefficient is comparable to other SLs. Calculations based on Rytov’s elastic model show that the phonon group velocity is reduced due to folding by more than a factor of two relative to its value in bulk CdTe or HgTe. Thermal conductivity is found to be relatively constant over a wide range of temperatures.},
doi = {10.1063/1.4959159},
journal = {AIP Advances},
number = 7,
volume = 6,
place = {United States},
year = {2016},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1063/1.4959159

Figures / Tables:

FIG. 1 FIG. 1: 3ω measurement of superlattice sample instrumented with heater, temperature sensor, and voltage probe.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.