Switchable chiral pair density wave in pure CsV 3 Sb 5

Physical review. B./Physical review. B 2026 Open access

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Authors: Wei Song, Xiao-Yu Yan, Xin Yu, Desheng Wu, Deng Hu, Hailang Qin, Guowei Liu, Hanbin Deng, Chao Yan, Muwei Gao, Zhiwei Wang, Rui Wu
+1 more Jia‐Xin Yin
DOI: 10.1103/j98r-9m59
Cited by: 3
References: 37

Abstract

We investigate electron pairing in a super clean kagome superconductor CsV3Sb5 with a residual resistivity ratio (RRR) of 290. By using the dilution-refrigerator-based scanning tunneling microscopy (STM) at the Synergetic Extreme Condition User Facility (SECUF), we find that the pairing gap exhibits chiral 2x2 modulations, and their chirality can be controlled by magnetic field training. We introduce nonmagnetic impurities to observe the complete suppression of 2x2 pairing modulations in presence of persistent 2x2 charge order. This nonmagnetic pair-breaking effect provides phase-sensitive evidence for pair-density-wave (PDW) induced pairing modulations. Our results support switchable chiral 2x2 PDW in this super clean kagome superconductor.

Fields of Study & Subjects

High-pressure geophysics and materials Solid-state spectroscopy and crystallography Crystal Structures and Properties

Publication details

Journal / source
Physical review. B./Physical review. B
Publisher
American Physical Society (APS)
Volume
113
Issue
12
Publication date
17 February 2026
Language
EN