Ferromagnetism in Cr-doped topological insulator TlSbTe2
| Autor: | Wang, Zhiwei, Segawa, Kouji, Sasaki, Satoshi, Taskin, A. A., Ando, Yoichi |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | APL Materials 3, 083302 (2015) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1063/1.4922002] |
| Popis: | We have synthesized a new ferromagnetic topological insulator by doping Cr to the ternary topological-insulator material TlSbTe2. Single crystals of Tl_{1-x}Cr_{x}SbTe2 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 (SdH) 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%. Comment: 13 pages, 7 figures; accepted for publication in APL Materials |
| Databáze: | arXiv |
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