BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Microfocus laser-ARPES on encapsulated mono-\, bi- and few-layer 1
 T'-WTe2
DTSTART:20181214T151500
DTSTAMP:20260527T163422Z
UID:18f3a65e248b73d89f250ea2e260a3a0718f51fc9c28c8eaabce6309
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Felix Baumberger\, Department of Quantum Matter Physics\
 , Université de Genève\nTwo-dimensional crystals of semi-metallic van de
 r Waals materials hold much potential for the realization of novel phases\
 , as exemplified by the recent discoveries of a polar metal in few-layer 1
 T’-WTe2 and of a quantum spin Hall state in monolayers of the same mate
 rial. Understanding these phases is particularly challenging because littl
 e is known from experiment about the momentum space electronic structure o
 f ultrathin crystals. In this talk\, I will discuss direct electronic stru
 cture measurements of exfoliated mono- bi- and few-layer 1T’-WTe2 by la
 ser-based micro-focus angle resolved photoemission. This is achieved by en
 capsulating a flake of WTe2 comprising regions of different thickness wit
 h monolayer graphene. Our data support the recent identification of a quan
 tum spin Hall state in monolayer 1T'-WTe2 and reveal strong signatures of
  the broken inversion symmetry in the bilayer. We finally discuss the sens
 itivity of encapsulated samples to contaminants following exposure to ambi
 ent atmosphere.\n \nAbout the research of the speaker: https://dqmp.unig
 e.ch/baumberger/\n 
LOCATION:CE 1 5 https://plan.epfl.ch/?room==CE%201%205
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR