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Title: Thermoelectricity in transition metal compounds: The role of spin disorder

Journal Article · · Physical Chemistry Chemical Physics. PCCP
DOI:https://doi.org/10.1039/C6CP06943F· OSTI ID:1334588
 [1];  [1];  [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)

Here, at room temperature and above, most magnetic materials adopt a spin-disordered (paramagnetic) state whose electronic properties can differ significantly from their low-temperature, spin-ordered counterparts. Yet computational searches for new functional materials usually assume some type of magnetic order. In the present work, we demonstrate a methodology to incorporate spin disorder in computational searches and predict the electronic properties of the paramagnetic phase. We implement this method in a high-throughput framework to assess the potential for thermoelectric performance of 1350 transition-metal sulfides and find that all magnetic systems we identify as promising in the spin-ordered ground state cease to be promising in the paramagnetic phase due to disorder-induced deterioration of the charge carrier transport properties. We also identify promising non-magnetic candidates that do not suffer from these spin disorder effects. In addition to identifying promising materials, our results offer insights into the apparent scarcity of magnetic systems among known thermoelectrics and highlight the importance of including spin disorder in computational searches.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); NREL Laboratory Directed Research and Development (LDRD)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1334588
Report Number(s):
NREL/JA-5K00-67504; PPCPFQ
Journal Information:
Physical Chemistry Chemical Physics. PCCP, Vol. 18, Issue 46; ISSN 1463-9076
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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Cited By (3)

Improvement of Thermoelectricity Through Magnetic Interactions in Layered Cr 2 Ge 2 Te 6 journal June 2018
Selective synthesis of higher manganese silicides: a new Mn17Si30 phase, its electronic, transport, and optical properties in comparison with Mn4Si7 journal February 2018
High-throughput prediction of the ground-state collinear magnetic order of inorganic materials using Density Functional Theory journal June 2019

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