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SUMMARY:Tunable Quantum Anomalous Hall Effect in Rhombohedral Graphene Moi
 ré Superlattices
DTSTART;VALUE=DATE-TIME:20260528T060000Z
DTEND;VALUE=DATE-TIME:20260528T070000Z
DTSTAMP;VALUE=DATE-TIME:20260702T025100Z
UID:indico-event-5063@indico-tdli.sjtu.edu.cn
DESCRIPTION:Speakers: Shuigang Xu（徐水钢） (Westlake University)\n\n
 Host: Prof. Haibiao Zhou  Venue: TDLI Meeting Room N601Tencent Meeting
  link: https://meeting.tencent.com/dm/6PlgqI9LUnVo Meeting ID: 223664449
 \, no password Abstract:Topological flat bands\, characterized by flat el
 ectronic dispersion and nontrivial topology\, are of fundamental importanc
 e in condensed matter physics\, providing a theoretical platform for explo
 ring exotic quantum states such as unconventional superconductivity and th
 e quantum anomalous Hall effect. In rhombohedral multilayer graphene\, the
  low-energy electronic bands exhibit a layer-dependent power-law dispersio
 n\, combining pronounced flat-band character with strong Berry curvature. 
 Crucially\, the band structure and Berry curvature distribution can be con
 tinuously tuned by an external electric field\, offering an ideal platform
  for realizing correlated topological states including tunable quantum ano
 malous Hall effects. In this talk\, we will discuss how moiré superlattic
 es introduced via heterojunctions or homojunctions can be used to engineer
  isolated surface flat bands in rhombohedral multilayer graphene\, and how
  this platform has enabled the observation of novel quantum phenomena such
  as interlayer-polarized ferromagnetic states\, chirality-tunable Chern in
 sulator states\, and high-Chern-number quantum anomalous Hall states. Bio
 graphy:Dr. Shuigang Xu is currently an Assistant Professor in department o
 f Physics at Westlake University. He received his B.S. from Wuhan Universi
 ty in 2009 and his Ph.D. in physics from the Hong Kong University of Scien
 ce and Technology in 2013. After his doctoral studies\, he continued as a 
 postdoctoral researcher in the same group before joining the Condensed Mat
 ter Physics Group at the University of Manchester\, UK\, in 2016. In Septe
 mber 2021\, he joined the Department of Physics at Westlake University\, w
 here he established the 2D Materials and Quantum Transport Laboratory. Dr.
  Xu's group has been engaged in the synthesis of two-dimensional materials
 \, investigation of quantum transport properties\, and development of van 
 der Waals heterostructure-based devices. Recently\, his group has achieved
  a series of advances in strongly correlated effects\, topological states\
 , and unconventional ferroelectricity in two-dimensional materials.\n\nhtt
 ps://indico-tdli.sjtu.edu.cn/event/5063/
LOCATION:Tsung-Dao Lee Institute/N6F-N601 - Meeting Room (Tsung-Dao Lee In
 stitute)
URL:https://indico-tdli.sjtu.edu.cn/event/5063/
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