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SUMMARY:Indication of time-reversal symmetry breaking superconductivity in
  kagome CsV3Sb5
DTSTART;VALUE=DATE-TIME:20260327T020000Z
DTEND;VALUE=DATE-TIME:20260327T030000Z
DTSTAMP;VALUE=DATE-TIME:20260405T215400Z
UID:indico-event-4855@indico-tdli.sjtu.edu.cn
DESCRIPTION:Speakers: Xiao Lin (林效) (Westlake University)\n\nHost: Pr
 of. Baiqing Lv  Venue: TDLI Meeting Room N400Tencent Meeting link: htt
 ps://meeting.tencent.com/dm/cuowPAvWaavKMeeting ID: 850131880\, no passwor
 d Abstract:The interplay among frustrated lattice geometry\, non-trivial 
 band topology and correlation yields rich quantum states of matter in kago
 me systems. A series of recent members in this family\, AV3Sb5 (A = K\, Rb
  or Cs)\, exhibit a cascade of symmetry-breaking transitions\, involving t
 he 3Q chiral charge ordering\, electronic nematicity\, roton pair density 
 wave and superconductivity. The nature of the superconducting order is yet
  to be resolved. Here we report an indication of dynamic superconducting d
 omains with boundary supercurrents in intrinsic CsV3Sb5 flakes. The magnet
 ic field-free superconducting diode effect is observed with polarity modul
 ated by thermal histories\, suggesting that there are dynamic superconduct
 ing order domains in a spontaneous time-reversal symmetry-breaking backgro
 und. Strikingly\, the critical current exhibits double-slit superconductiv
 ity interference patterns when subjected to an external magnetic field. Th
 e characteristics of the patterns are modulated by thermal cycling. These 
 phenomena are proposed as a consequence of periodically modulated supercur
 rents flowing along certain domain boundaries constrained by fluxoid quant
 ization. Furthermore\, thermally modulated intrinsic d.c and a.c. Josephso
 n effects are observed in CsV3Sb5 flakes\, strongly suggesting the presenc
 e of dynamic superconducting domains with weak links at domain boundaries.
  All these observations fall into the framework of chiral superconducting 
 domain network\, offering new insights into the superconducting nature of 
 Kagome systems. Biography:Dr. Xiao Lin received his B.S. degree from Zhej
 iang University (2008)\, and Ph.D. degree from Zhejiang University (2013).
  He did his postdoctoral studies at Ecole Supérieure de Physique et de Ch
 imie Industrielles (ESPCI)\, Paris Tech. from 2013 to 2015. He became a Hu
 mboldt postdoctoral research fellow at Cologne University from 2016 to 201
 8. He joined Westlake University as an assistant professor in 2018 and was
  promoted to a tenured associate professor in 2025. Dr. Lin has rich expe
 rience in studying the transport properties of quantum matter\, such as po
 lar superconductors\, polar metals\, chiral superconductors\, etc. His cur
 rent research interests focus on nonlinear optical/transport phenomena\, s
 uperconducting diode effect\, quantum transport and quantum phase manipula
 tion.\n\nhttps://indico-tdli.sjtu.edu.cn/event/4855/
LOCATION:Tsung-Dao Lee Institute/N4F-N400 - meeting room (Tsung-Dao Lee In
 stitute)
URL:https://indico-tdli.sjtu.edu.cn/event/4855/
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