Twofold symmetry of c-axis resistivity in topological kagome superconductor CsV3Sb5 with in-plane rotating magnetic field

Ying Xiang, Qing Li, Yongkai Li, Wei Xie, Huan Yang (), Zhiwei Wang (), Yugui Yao and Hai-Hu Wen ()
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Ying Xiang: Nanjing University
Qing Li: Nanjing University
Yongkai Li: Beijing Institute of Technology
Wei Xie: Nanjing University
Huan Yang: Nanjing University
Zhiwei Wang: Beijing Institute of Technology
Yugui Yao: Beijing Institute of Technology
Hai-Hu Wen: Nanjing University

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract In transition metal compounds, due to the interplay of charge, spin, lattice and orbital degrees of freedom, many intertwined orders exist with close energies. One of the commonly observed states is the so-called nematic electron state, which breaks the in-plane rotational symmetry. This nematic state appears in cuprates, iron-based superconductor, etc. Nematicity may coexist, affect, cooperate or compete with other orders. Here we show the anisotropic in-plane electronic state and superconductivity in a recently discovered kagome metal CsV3Sb5 by measuring c-axis resistivity with the in-plane rotation of magnetic field. We observe a twofold symmetry of superconductivity in the superconducting state and a unique in-plane nematic electronic state in normal state when rotating the in-plane magnetic field. Interestingly these two orders are orthogonal to each other in terms of the field direction of the minimum resistivity. Our results shed new light in understanding non-trivial physical properties of CsV3Sb5.

Date: 2021
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DOI: 10.1038/s41467-021-27084-z

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