Switchable chiral pair density wave in pure <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi>CsV</mi><mn>3</mn></msub><msub><mi>Sb</mi><mn>5</mn></msub></mrow></math>

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 ${CsV}_{3} {Sb}_{5}$

Wei Song^1,*, Xiao-Yu Yan^1,*, Xin Yu ^2,*, Desheng Wu ^3,*, Deng Hu ^4,5, Hailang Qin³, Guowei Liu³, Hanbin Deng ¹, Chao Yan¹ et al.

Muwei Gao¹, Zhiwei Wang^4,5, Rui Wu ^2,†, and Jia-Xin Yin ^1,3,‡

¹State Key Laboratory of Quantum Functional Materials, Department of Physics, Guangdong Provincial Key Laboratory of Advanced Thermoelectric Materials and Device Physics, and Guangdong Basic Research Center of Excellence for Quantum Science, Southern University of Science and Technology, Shenzhen 518055, China
²Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
³Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area, Shenzhen, China
⁴Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology, Beijing, China
⁵Beijing Key Lab of Nanophotonics and Ultrafine Optoelectronic Systems, Beijing Institute of Technology, Beijing, China

^*These authors contributed equally to this work.
^†Contact author: wurui@iphy.ac.cn
^‡Contact author: yinjx@sustech.edu.cn

PDF

Phys. Rev. B 113, 125127 – Published 12 March, 2026

DOI: https://doi.org/10.1103/j98r-9m59

Abstract

We investigate electron pairing in a super clean kagome superconductor ${CsV}_{3} {Sb}_{5}$ 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.

Physical Review B

Export citation

Export citation

Switchable chiral pair density wave in pure ${CsV}_{3} {Sb}_{5}$

Abstract

Physics Subject Headings (PhySH)

Authorization Required

Other Options

Supplemental Material (Subscription Required)

References (Subscription Required)

Outline

Information

Filter

Filter

Article Lookup

Enter a citation

Switchable chiral pair density wave in pure CsV3Sb5

Abstract

Physics Subject Headings (PhySH)

Authorization Required

Log in via your institution

Log in via APS Member Subscription

Other Options

Supplemental Material (Subscription Required)

References (Subscription Required)

Switchable chiral pair density wave in pure ${CsV}_{3} {Sb}_{5}$