期刊
PHYSICAL REVIEW B
卷 92, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.92.205204
关键词
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资金
- DFG [SPP1386]
- US Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division
- ARC grant from the Communaute Francaise de Belgique [10/15-03]
- EU FP7 [RI-283493, RI-312763]
Using a combination of first-principles calculations and experimental transport measurements, we study the electronic and magnetic structure of the unfilled skutterudite FeSb3. We employ the hybrid functional approach for exchange correlation. The ground state is determined to be antiferromagnetic with an atomic magnetic moment of 1.6 mu(B)/Fe. The Neel temperature T-N is estimated at 6 K, in agreement with experiments which found a paramagnetic state down to 10 K. The ground state is semiconducting, with a small electronic gap of 33 meV, also consistent with previous experiments on films. Charge carrier concentrations are estimated from Hall resistance measurements. The Seebeck coefficient is measured and mapped using a scanning probe at room temperature that yields an average value of 38.6 mu V K-1, slightly lower than the theoretical result. The theoretical conductivity is analyzed as a function of temperature and concentration of charge carriers.
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