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

Zhang, Kejia; Yadav, Abhishek; Shao, Lei; Bommena, Ramana; Zhao, Jun; Velicu, Silviu; Pipe, Kevin P.

doi:10.1063/1.4959159

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:

Zhang, Kejia;

;

; Bommena, Ramana; Zhao, Jun;

; Pipe, Kevin P.

Publication Date:: Fri Jul 01 00:00:00 EDT 2016

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)

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.

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                    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.  https://doi.org/10.1063/1.4959159

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                    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.  https://doi.org/10.1063/1.4959159.

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@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         = {Fri Jul 01 00:00:00 EDT 2016},

  month        = {Fri Jul 01 00:00:00 EDT 2016}

}

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Figures / Tables:

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

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