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UID:DSC-22068
DTSTART;TZID=Europe/Berlin:20250618T110000
SEQUENCE:1750225208
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20250618T120000
URL:https://dresden-science-calendar.org/calendar/en/detail/22068
LOCATION:IFW\, Helmholtzstraße 2001069 Dresden
SUMMARY:Li: Exploring Correlated Topological Phases in Two-Dimensional TaIr
 Te4
CLASS:PUBLIC
DESCRIPTION:Speaker: Dr. Jiangxu Li\nInstitute of Speaker: University of Te
 nnessee\, Knoxville / Dept. of Physics and Astronomy\nTopics:\n\n Location
 :\n  Name: IFW (Zoom: \, https://zoom.us/my/meeting.with.jeroen)\n  Street
 : Helmholtzstraße 20\n  City: 01069 Dresden\n  Phone: \n  Fax: \nDescript
 ion: TaIrTe4 is an established two-dimensional topological insulator known
  for exhibiting intriguing quantum states. Around its Fermi level\, pronou
 nced Van Hove singularities (VHS) exist in both conduction and valence ban
 ds\, driving electronic instabilities that prompt charge density wave (CDW
 ) formation [1]. Moreover\, the recent observation [2] of a correlated qua
 ntum spin Hall effect in this system underscores the necessity to deeply u
 nderstand electron-electron interactions.  In this talk\, I will present a
  combined theoretical and experimental investigation into the correlated e
 lectronic phases of TaIrTe4. Using Hartree-Fock Mean Field (HFMF) simulati
 ons\, we constructed the interacting phase diagram for the CDW configurati
 on. Our calculations systematically explore how varying dielectric constan
 ts and interaction strengths influence electronic states. Remarkably\, bey
 ond the previously identified dual quantum spin Hall insulator (QSHI) stat
 e\, our theoretical approach uncovers additional phases\, including trivia
 l insulating states\, higher-order topological insulators (HOTIs)\, and me
 tallic phases.  Critically\, these theoretical insights have been confirme
 d experimentally through detailed edge-state transport measurements. These
  measurements clearly validate the presence of the predicted correlated in
 sulator\, QSHI\, and metallic phases\, providing robust experimental backi
 ng for our theoretical framework. This work not only enhances our fundamen
 tal understanding of topological materials but also paves the way for furt
 her exploration of correlated quantum phenomena in two-dimensional systems
 .  Ref: Nano Lett. 17\, 467–475 (2017)\; Nature. 628\, 515-521 (2024)
DTSTAMP:20260427T125107Z
CREATED:20250613T053746Z
LAST-MODIFIED:20250618T054008Z
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