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Title: Electronic structure, transport, and phonons of SrAgChF (Ch = S,Se,Te): Bulk superlattice thermoelectrics

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [1];  [2];  [3];  [4];  [4];  [5]
  1. Indian Institute of Technology Hyderabad, Telangana (India)
  2. Univ. of Hyderabad, Telangana (India)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Aarhus Univ., Aarhus (Denmark)
  5. Michigan State Univ., East Lansing, MI (United States)

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.

Research Organization:
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 Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725; SC0001299; FG02-09ER46577
OSTI ID:
1195812
Alternate ID(s):
OSTI ID: 1194832
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 4; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Cited By (4)

Effects of Ga substitution on electronic and thermoelectric properties of gapless semiconductor V 3 Al journal January 2019
Structural, electronic, mechanical, and thermoelectric properties of a novel half Heusler compound HfPtPb journal July 2017
Calculation of the stability and mechanical and phonon properties of NbRuB, TaRuB, and NbOsB compounds journal October 2018
Improved thermoelectric performance of p-doped half-Heusler Ti 0.5 Zr 0.5 CoSb 0.5 P 0.5 , Ti 0.5 Hf 0.5 CoSb 0.5 P 0.5 , and Zr 0.5 Hf 0.5 CoSb 0.5 P 0.5 compounds journal November 2019

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