Enhanced thermoelectric power and electronic correlations in RuSe 2
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
- Photon Sciences Directorate, Brookhaven National Laboratory, Upton, New York 11973, USA
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA, Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, USA
We report the electronic structure, electric and thermal transport properties of Ru1-xIrxSe₂ (x ≤ 0.2). RuSe₂ is a semiconductor that crystallizes in a cubic pyrite unit cell. The Seebeck coefficient of RuSe₂ exceeds -200 μV/K around 730 K. Ir substitution results in the suppression of the resistivity and the Seebeck coefficient, suggesting the removal of the peaks in density of states near the Fermi level. Ru0.8Ir0.2Se₂ shows a semiconductor-metal crossover at about 30 K. The magnetic field restores the semiconducting behavior. Our results indicate the importance of the electronic correlations in enhanced thermoelectricity of RuSb₂.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-98CH10886; SC00112704
- OSTI ID:
- 1618876
- Alternate ID(s):
- OSTI ID: 1183257; OSTI ID: 1185051
- Report Number(s):
- BNL-107667-2015-JA
- Journal Information:
- APL Materials, Journal Name: APL Materials Vol. 3 Journal Issue: 4; ISSN 2166-532X
- Publisher:
- American Institute of PhysicsCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 12 works
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