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http://hdl.handle.net/10119/12894
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| タイトル: | Systematic study of electronic and magnetic properties for Cu_<12-x> TM_xSb_4S_<13> (TM = Mn, Fe, Co, Ni, and Zn) tetrahedrite |
| 著者: | Suekuni, K.
Tomizawa, Y.
Ozaki, T.
Koyano, M. |
| 発行日: | 2014-04-09 |
| 出版者: | American Institute of Physics |
| 誌名: | Journal of Applied Physics |
| 巻: | 115 |
| 号: | 14 |
| 開始ページ: | 143702-1 |
| 終了ページ: | 143702-5 |
| DOI: | 10.1063/1.4871265 |
| 抄録: | Substitution effects of 3d transition metal (TM) impurities on electronic and magnetic properties for Cu_<12>Sb_4S_<13> tetrahedrite are investigated by the combination of low-temperature experiments and first-principles electronic-structure calculations. The electrical resistivity for the cubic phase of Cu_<12>Sb_4S_<13> exhibits metallic behavior due to an electron-deficient character of the compound. Whereas that for 0.5 ≤ x ≤ 2.0 of Cu _<12− x>Ni _xSb_4S_<13> exhibits semiconducting behavior. The substituted Ni for Cu is in the divalent ionic state with a spin magnetic moment and creates impurity bands just above the Fermi level at the top of the valence band. Therefore, the semiconducting behavior of the electrical resistivity is attributed to the thermal excitation of electrons from the valence band to the impurity band. The substitution effect of TM on the electronic structure and the valency of TM for Cu _<11.0>TM_<1.0>Sb_4S_<13> are systematically studied by the calculation. The substituted Mn, Fe, and Co for Cu are found to be in the ionic states with the spin magnetic moments due to the large exchange splitting of the 3d bands between the minority- and majority-spin states. |
| Rights: | Copyright 2014 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in K. Suekuni, Y. Tomizawa, T. Ozaki, and M. Koyano, Journal of Applied Physics, 115(14), 143702 (2014) and may be found at http://dx.doi.org/10.1063/1.4871265 |
| URI: | http://hdl.handle.net/10119/12894 |
| 資料タイプ: | publisher |
| 出現コレクション: | c10-1. 雑誌掲載論文 (Journal Articles)
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