Anisotropic Magnetoresistivity in Semimetal TaSb2
We investigate the anisotropic magnetic transports in topological semimetal TaSb2. The compound shows the large magnetoresistance（MR） without saturation and the metal-insulator-like transition no matter whether the magnetic field is parallel to c-axis or a-axis, except that the MR for B‖c is almost...
Saved in:
| Published in | 中国物理快报：英文版 Vol. 34; no. 12; pp. 70 - 74 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.12.2017
|
| Online Access | Get full text |
Cover
Loading…
| Summary: | We investigate the anisotropic magnetic transports in topological semimetal TaSb2. The compound shows the large magnetoresistance（MR） without saturation and the metal-insulator-like transition no matter whether the magnetic field is parallel to c-axis or a-axis, except that the MR for B‖c is almost twice as large as that of B‖a at low temperatures. The adopted Kohler＇s rule can be obeyed by the MR at distinct temperatures for B‖c,but it is slightly violated as B‖a. The angle-dependent MR measurements exhibit the two-fold rotational symmetry below70 K,consistent with the monoclinic crystal structure of TaSb2. The dumbbell-like picture of angle-dependent MR in TaSb2 suggests a strongly anisotropic Fermi surface at low temperatures. However, it finally loses the two-fold symmetry over 70 K, implying a possible topological phase transition at around the temperature where Tm is related to a metal-insulator-like transition under magnetic fields. |
|---|---|
| Bibliography: | 11-1959/O4 Xia-Yin Liu, Jia-Lu Wang, Wei You, Ting-Ting Wang, Hai-Yang Yang, Wen-He Jiao, Hong-Ying Mao, Li Zhang, Jie Cheng , Yu-Ke （ 1 Department of Physics, Zhejiang University of Science and Technology, Hangzhou 310023 2Department of Physics and Hangzhou Key Laboratory of Quantum Matters, Hangzhou Normal University, Hangzhou 310036 3Department of Physics, China Jiliang University, Hangzhou 310018 4 College of Science, Center of Advanced Functional Ceramics, Nanjing University of Posts and Telecommunications Nanjing 210023） We investigate the anisotropic magnetic transports in topological semimetal TaSb2. The compound shows the large magnetoresistance（MR） without saturation and the metal-insulator-like transition no matter whether the magnetic field is parallel to c-axis or a-axis, except that the MR for B‖c is almost twice as large as that of B‖a at low temperatures. The adopted Kohler＇s rule can be obeyed by the MR at distinct temperatures for B‖c,but it is slightly violated as B‖a. The angle-dependent MR measurements exhibit the two-fold rotational symmetry below70 K,consistent with the monoclinic crystal structure of TaSb2. The dumbbell-like picture of angle-dependent MR in TaSb2 suggests a strongly anisotropic Fermi surface at low temperatures. However, it finally loses the two-fold symmetry over 70 K, implying a possible topological phase transition at around the temperature where Tm is related to a metal-insulator-like transition under magnetic fields. |
| ISSN: | 0256-307X 1741-3540 |
| DOI: | 10.1088/0256-307x/34/12/127501 |