Three-dimensional hidden phase probed by in-plane magnetotransport in kagome metal CsV3Sb5 thin flakes

Xinjian Wei, Congkuan Tian, Hang Cui, Yuxin Zhai, Yongkai Li, Shaobo Liu, Yuanjun Song, Ya Feng, Miaoling Huang, Zhiwei Wang, Yi Liu, Qihua Xiong, Yugui Yao, X. C. Xie and Jian-Hao Chen ()
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Xinjian Wei: Beijing Academy of Quantum Information Sciences
Congkuan Tian: Beijing Academy of Quantum Information Sciences
Hang Cui: Peking University
Yuxin Zhai: Tsinghua University
Yongkai Li: Beijing Institute of Technology
Shaobo Liu: Beijing Academy of Quantum Information Sciences
Yuanjun Song: Beijing Academy of Quantum Information Sciences
Ya Feng: Beijing Academy of Quantum Information Sciences
Miaoling Huang: Beijing Academy of Quantum Information Sciences
Zhiwei Wang: Beijing Institute of Technology
Yi Liu: Beijing Normal University
Qihua Xiong: Beijing Academy of Quantum Information Sciences
Yugui Yao: Beijing Institute of Technology
X. C. Xie: Peking University
Jian-Hao Chen: Beijing Academy of Quantum Information Sciences

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract Transition metal compounds with kagome structure have been found to exhibit a variety of exotic structural, electronic, and magnetic orders. These orders are competing with energies very close to each other, resulting in complex phase transitions. Some of the phases are easily observable, such as the charge density wave (CDW) and the superconducting phase, while others are more challenging to identify and characterize. Here we present magneto-transport evidence of a new phase below ~ 35 K in the kagome topological metal CsV3Sb5 (CVS) thin flakes between the CDW and the superconducting transition temperatures. This phase is characterized by six-fold rotational symmetry in the in-plane magnetoresistance (MR) and is connected to the orbital current order in CVS. Furthermore, the phase is characterized by a large in-plane negative magnetoresistance, which suggests the existence of a three-dimensional, magnetic field-tunable orbital current ordered phase. Our results highlight the potential of magneto-transport to reveal the interactions between exotic quantum states of matter and to uncover the symmetry of such hidden phases.

Date: 2024
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DOI: 10.1038/s41467-024-49248-3

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