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Title: Enhanced thermoelectric power and electronic correlations in RuSe 2

Abstract

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.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [2];  [2];  [3];  [1]
  1. Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
  2. Photon Sciences Directorate, Brookhaven National Laboratory, Upton, New York 11973, USA
  3. 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
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1618876
Alternate Identifier(s):
OSTI ID: 1183257; OSTI ID: 1185051
Report Number(s):
BNL-107667-2015-JA
Journal ID: ISSN 2166-532X
Grant/Contract Number:  
AC02-98CH10886; SC00112704
Resource Type:
Published Article
Journal Name:
APL Materials
Additional Journal Information:
Journal Name: APL Materials Journal Volume: 3 Journal Issue: 4; Journal ID: ISSN 2166-532X
Publisher:
American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Wang, Kefeng, Wang, Aifeng, Tomic, A., Wang, Limin, Abeykoon, A. M. Milinda, Dooryhee, E., Billinge, S. J. L., and Petrovic, C. Enhanced thermoelectric power and electronic correlations in RuSe 2. United States: N. p., 2015. Web. doi:10.1063/1.4913919.
Wang, Kefeng, Wang, Aifeng, Tomic, A., Wang, Limin, Abeykoon, A. M. Milinda, Dooryhee, E., Billinge, S. J. L., & Petrovic, C. Enhanced thermoelectric power and electronic correlations in RuSe 2. United States. https://doi.org/10.1063/1.4913919
Wang, Kefeng, Wang, Aifeng, Tomic, A., Wang, Limin, Abeykoon, A. M. Milinda, Dooryhee, E., Billinge, S. J. L., and Petrovic, C. Wed . "Enhanced thermoelectric power and electronic correlations in RuSe 2". United States. https://doi.org/10.1063/1.4913919.
@article{osti_1618876,
title = {Enhanced thermoelectric power and electronic correlations in RuSe 2},
author = {Wang, Kefeng and Wang, Aifeng and Tomic, A. and Wang, Limin and Abeykoon, A. M. Milinda and Dooryhee, E. and Billinge, S. J. L. and Petrovic, C.},
abstractNote = {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.},
doi = {10.1063/1.4913919},
journal = {APL Materials},
number = 4,
volume = 3,
place = {United States},
year = {Wed Apr 01 00:00:00 EDT 2015},
month = {Wed Apr 01 00:00:00 EDT 2015}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1063/1.4913919

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Cited by: 12 works
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