Extremely large magnetoresistance in an unfilled skutterudite quadratic contact point semimetal CoP3-Reference-Cited by-同舟云学术

Extremely large magnetoresistance in an unfilled skutterudite quadratic contact point semimetal CoP3

Published:2023-06-19 Issue:25 Volume:122 Page:
ISSN:0003-6951
Container-title:Applied Physics Letters
language:en
Short-container-title:

Author:

Fan Chenxin¹^ORCID,Yuan Jian¹,Shi Xianbiao²,Yang Yichen³^ORCID,Xi Chuanying⁴,Pi Li⁴,Wang Xia¹⁵,Yu Na⁵,Zou Zhiqiang⁵,Wang Baotian²^ORCID,Shen Dawei³⁶,Guo Yanfeng¹⁷^ORCID

Affiliation:

1. School of Physical Science and Technology, ShanghaiTech University 1 , Shanghai 201210, China

2. Institute of High Energy Physics, Chinese Academy of Sciences 2 , Beijing 100049, China

3. State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences 3 , Shanghai 200050, China

4. Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory of the Chinese Academy of Sciences 4 , Hefei 230031, China

5. Analytical Instrumentation Center, School of Physical Science and Technology, ShanghaiTech University 5 , Shanghai 201210, China

6. National Synchrotron Radiation Laboratory, University of Science and Technology of China 6 , 42 South Hezuohua Road, Hefei, Anhui 230029, China

7. ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University 7 , Shanghai 201210, China

Abstract

Extremely large magnetoresistance (EXMR) and high mobility are always desired for use in spintronic devices. Herein, we report the observation of EXMR and very large hole mobility reaching ∼ 2 × 104% (30 T) and ∼2 × 104 cm2 V−1 s−1, respectively, at 2 K in an unfilled skutterudite CoP3 crystal. The magnetotransport measurements unveil remarkable Shubnikov–de Haas quantum oscillations hosting nontrivial Berry phase induced by strong Zeeman splitting. First-principles calculations suggest band inversion between Co-dxy/yz and P-pz orbitals, which forms fourfold quadratic contact point at the Γ point above the Fermi level of ∼0.146 eV. The angle-resolved photoelectron spectroscopy measurements verify the calculated surface state. The results provide a quadratic contact point semimetal, which has potential applications in topological devices.

Funder

National Natural Science Foundation of China

State Key Laboratory of Functional Materials for Informatics

Double First-Class Initative Fund of ShanghgaiTech Universaity

Publisher

AIP Publishing

Subject

Physics and Astronomy (miscellaneous)

Link

https://pubs.aip.org/aip/apl/article-pdf/doi/10.1063/5.0154847/18016186/253103_1_5.0154847.pdf

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