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セガワ コウジ
SEGAWA KOJI
瀬川 耕司 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2015/08 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Ferromagnetism in Cr-doped topological insulator TlSbTe2 |
| 執筆形態 | その他 |
| 掲載誌名 | APL MATERIALS |
| 掲載区分 | 国外 |
| 出版社・発行元 | AMER INST PHYSICS |
| 巻・号・頁 | 3(8) |
| 著者・共著者 | Zhiwei Wang,Kouji Segawa,Satoshi Sasaki,A. A. Taskin,Yoichi Ando |
| 概要 | We have synthesized a new ferromagnetic topological insulator by doping Cr to the ternary topological-insulator material TlSbTe2. Single crystals of Tl1-xCrxSbTe2 were grown by a melting method and it was found that Cr can be incorporated into the TlSbTe2 matrix only within the solubility limit of about 1%. The Curie temperature theta(C) was found to increase with the Cr content but remained relatively low, with the maximum value of about 4 K. The easy axis was identified to be the c-axis and the saturation moment was 2.8 mu(B) (Bohr magneton) at 1.8 K. The in-plane resistivity of all the samples studied showed metallic behavior with p-type carriers. Shubnikov-de Hass oscillations were observed in samples with the Cr-doping level of up to 0.76%. We also tried to induce ferromagnetism in TlBiTe2 by doping Cr, but no ferromagnetism was observed in Cr-doped TlBiTe2 crystals within the solubility limit of Cr which turned out to be also about 1%. (C) 2015 Author(s). |
| DOI | 10.1063/1.4922002 |
| ISSN | 2166-532X |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84930736048&origin=inward |