Switchable chiral pair density wave in pure CsV3Sb5

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; Jia Xin Yin

doi:10.1103/J98R-9M59

Switchable chiral pair density wave in pure CsV₃Sb₅

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^*
, Jia Xin Yin

^*Corresponding author for this work

Southern University of Science and Technology
CAS - Institute of Physics
Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area
Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We investigate electron pairing in a super clean kagome superconductor CsV₃Sb₅ with a residual resistivity ratio (RRR) of 290. 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 2 × 2 modulations, and their chirality can be controlled by magnetic field training. We introduce nonmagnetic impurities to observe the complete suppression of 2 × 2 pairing modulations in presence of persistent 2 × 2 charge order. This nonmagnetic pair-breaking effect provides phase-sensitive evidence for pair-density-wave (PDW)-induced pairing modulations. Our results support switchable chiral 2 × 2 PDW in this super clean kagome superconductor.

Original language	English
Article number	125127
Pages (from-to)	1-7
Number of pages	7
Journal	Physical Review B
Volume	113
Issue number	12
DOIs	https://doi.org/10.1103/J98R-9M59
Publication status	Published - 2026
Externally published	Yes

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title = "Switchable chiral pair density wave in pure CsV3Sb5",

abstract = "We investigate electron pairing in a super clean kagome superconductor CsV3Sb5 with a residual resistivity ratio (RRR) of 290. 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 2 {\texttimes} 2 modulations, and their chirality can be controlled by magnetic field training. We introduce nonmagnetic impurities to observe the complete suppression of 2 {\texttimes} 2 pairing modulations in presence of persistent 2 {\texttimes} 2 charge order. This nonmagnetic pair-breaking effect provides phase-sensitive evidence for pair-density-wave (PDW)-induced pairing modulations. Our results support switchable chiral 2 {\texttimes} 2 PDW in this super clean kagome superconductor.",

author = "Wei Song and Yan, \{Xiao Yu\} and Xin Yu and Desheng Wu and Deng Hu and Hailang Qin and Guowei Liu and Hanbin Deng and Chao Yan and Muwei Gao and Zhiwei Wang and Rui Wu and Yin, \{Jia Xin\}",

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year = "2026",

doi = "10.1103/J98R-9M59",

language = "English",

volume = "113",

pages = "1--7",

journal = "Physical Review B",

issn = "2469-9950",

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TY - JOUR

T1 - Switchable chiral pair density wave in pure CsV3Sb5

AU - Song, Wei

AU - Yan, Xiao Yu

AU - Yu, Xin

AU - Wu, Desheng

AU - Hu, Deng

AU - Qin, Hailang

AU - Liu, Guowei

AU - Deng, Hanbin

AU - Yan, Chao

AU - Gao, Muwei

AU - Wang, Zhiwei

AU - Wu, Rui

AU - Yin, Jia Xin

PY - 2026

Y1 - 2026

N2 - We investigate electron pairing in a super clean kagome superconductor CsV3Sb5 with a residual resistivity ratio (RRR) of 290. 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 2 × 2 modulations, and their chirality can be controlled by magnetic field training. We introduce nonmagnetic impurities to observe the complete suppression of 2 × 2 pairing modulations in presence of persistent 2 × 2 charge order. This nonmagnetic pair-breaking effect provides phase-sensitive evidence for pair-density-wave (PDW)-induced pairing modulations. Our results support switchable chiral 2 × 2 PDW in this super clean kagome superconductor.

AB - We investigate electron pairing in a super clean kagome superconductor CsV3Sb5 with a residual resistivity ratio (RRR) of 290. 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 2 × 2 modulations, and their chirality can be controlled by magnetic field training. We introduce nonmagnetic impurities to observe the complete suppression of 2 × 2 pairing modulations in presence of persistent 2 × 2 charge order. This nonmagnetic pair-breaking effect provides phase-sensitive evidence for pair-density-wave (PDW)-induced pairing modulations. Our results support switchable chiral 2 × 2 PDW in this super clean kagome superconductor.

UR - https://www.scopus.com/pages/publications/105038247854

U2 - 10.1103/J98R-9M59

DO - 10.1103/J98R-9M59

M3 - Article

AN - SCOPUS:105038247854

SN - 2469-9950

VL - 113

SP - 1

EP - 7

JO - Physical Review B

JF - Physical Review B

IS - 12

M1 - 125127

ER -

Switchable chiral pair density wave in pure CsV₃Sb₅

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