Specific heat and NMR evidence for the low Fermi-level density of states in semimetallic ScSb

C. N. Kuo, C. C. Chen, C. M. Chang, R. Y. Huang, L. Y. Wang, Y. K. Kuo, C. S. Lue

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

We report the electronic and thermal properties of scandium monoantimonide ScSb by means of the Seebeck coefficient, thermal conductivity, specific heat, and nuclear magnetic resonance measurements. The experimental Seebeck coefficient exhibits a strong temperature dependence, and the theoretical calculation based on the two-band model provides a realistic description of the observed feature. The analysis of the thermal conductivity reveals that the lattice thermal conductivity dominates at low temperatures while electronic thermal conductivity makes a major contribution at high temperatures. A small value of the Sommerfeld coefficient of was extracted from the low-temperature specific heat measurement, indicative of a low electronic Fermi-level density of states (DOS) in ScSb. Furthermore, we have deduced the Sc and Sb partial Fermi-level DOSs based on the Korringa behavior in the and NMR spin-lattice relaxation rates. The determined values of the DOS are quite low, giving strong evidence for the semimetallic character in ScSb.

原文English
文章編號035135
期刊Physical Review B
104
發行號3
DOIs
出版狀態Published - 2021 7月 15

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

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