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SUMMARY:Topology and correlation in a monolayer topological insulator TaIr
 Te4
DTSTART:20260923T020000Z
DTEND:20260923T030000Z
DTSTAMP:20260925T102600Z
UID:indico-event-5309@indico-tdli.sjtu.edu.cn
DESCRIPTION:Speakers: Jian Tang（汤建） (Zhejiang University)\n\nHost:
  Prof. Anyuan Gao  \nVenue: TDLI Meeting Room N400\nTencent Meeting lin
 k: https://meeting.tencent.com/dm/4Fp9XuFFfKkf\n Meeting ID: 236922948\,
  no password\n \nAbstract:\nThe interplay of topology\, electronic correl
 ations\, and lattice degrees of freedom gives rise to rich quantum phenome
 na in low-dimensional materials. In this talk\, I will present our recent 
 discoveries in monolayer TaIrTe4\, a material hosting both topological and
  correlated electronic states. We discovered a dual quantum spin Hall (QSH
 ) effect\, revealing both single-particle and correlated topological state
 s within the same material. Further studies uncovered interaction-driven t
 ransitions among QSH insulator\, trivial insulator\, and metal phases\, de
 monstrating the central role of electronic correlations in shaping the top
 ological phase diagram. More recently\, we discovered spontaneous superlat
 tice memory effect\, a nonvolatile memory mechanism that encodes informati
 on directly into the lattice structure. This finding introduces a new appr
 oach to information storage beyond conventional charge- and spin-based mec
 hanisms. Crucially\, the superlattice also serves as a programmable struct
 ure whose reversible switching reshapes the electronic properties. Togethe
 r\, these discoveries link topology and electronic correlations with nonvo
 latile superlattice memory\, opening a route to controlling topological fl
 at bands and emergent quantum phases.\n \nBiography:\nJian Tang is a tenu
 re-track Assistant Professor at the School of Physics\, Zhejiang Universit
 y. He received his Ph.D. from the Institute of Physics\, Chinese Academy o
 f Sciences (IOP-CAS) in 2021 and subsequently conducted postdoctoral resea
 rch at Boston College until 2026. His research interests focus on the disc
 overy\, understanding\, and control of emergent quantum states in low-dime
 nsional materials and devices. His current work investigates topology\, el
 ectronic correlations\, and their interplay in two-dimensional topological
  insulators\, employing linear and nonlinear transport as complementary pr
 obes to uncover novel quantum phases and elucidate their underlying physic
 al mechanisms.\n\nhttps://indico-tdli.sjtu.edu.cn/event/5309/
LOCATION:Tsung-Dao Lee Institute/N4F-N400 - meeting room (Tsung-Dao Lee In
 stitute)
URL:https://indico-tdli.sjtu.edu.cn/event/5309/
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