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SUMMARY:QSE Quantum Seminar: "Graphene quantum devices"\, Klaus Ensslin
DTSTART:20251003T120000
DTEND:20251003T133000
DTSTAMP:20260521T032656Z
UID:cb7ef1e402f7f79f85531cc7219c960e4500c56869fdd0c046dfa8b9
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Klaus Ensslin\nPlease join us for the QSE Center Quan
 tum Seminar with Klaus Ensslin from ETH Zurich who will give the talk
  "Graphene quantum devices" on Friday October 3 from 12pm to 1:30pm \nL
 ocation: GC A3 31\n\nPizzas will be available between the seminars at 12
 :00. All PhDs\, postdocs\, students\, group leaders\, and PIs are welcome 
 to join us.\n\nTITLE: "Graphene quantum devices"\n\nABSTRACT:\nGraphene i
 s a semimetal\, but can become a semiconductor in case of bilayer graphene
 . High-quality quantum dots can be prepared in gate-defined bilayer graphe
 ne. Spin\, charge and valley states have been identified and lifetimes hav
 e been measured. When bilayer graphene is van der Waals bonded with a neig
 hboring layer of TMD (transition metal dichalcogenide) effects of spin-orb
 it interactions can be observed when the wavefunction in the bilayer graph
 ene is close to the TMD. For quantum point contacts we demonstrate situati
 ons where the spin-orbit splitting is comparable to the orbital level spli
 tting and can be tuned by gate voltages. Many of the techniques known for 
 conventional quantum dots (Si\, Ge\, GaAs) can be applied to graphene quan
 tum dots and give rise to unusual behavior of the level spectrum and its m
 anipulation by gate electrodes. This makes bilayer graphene a contender fo
 r different kinds of qubits\, such as charge\, spin and valley\, possibly 
 in connection with superconducting regions in the same material.\nThis wor
 k was done in collaboration with Jonas Gerber\, Efe Ersoy\, Christoph Adam
 \, Artem Denisov\, Wister Huang\, Michele Masseroni\, Max Ruckriegel\, Had
 rien Duprez\, Lisa Gächter\, Chuyao Tong\, Rebekka Garreis\, and Thomas I
 hn.\n\nBIO:\nEnsslin obtained his bachelor’s degree in physics from LMU 
 Munich and his master’s degree from ETH Zurich (1981–1986)\, followed 
 by doctoral studies at the Max-Planck-Institut for Solid State Research in
  Stuttgart (1986–1989). From 1989 to 1991\, he held a postdoctoral appoi
 ntment at the University of California\, Santa Barbara\, after which he wa
 s a University Assistant at LMU Munich (1991–1995). Since October 1995\,
  he has been Professor of Physics at ETH Zurich. From 2011 to 2022\, he se
 rved as Director of the National Center for Competence in Research on Quan
 tum Science and Technology.\n 
LOCATION:GC A3 31 https://plan.epfl.ch/?room==GC%20A3%2031
STATUS:CONFIRMED
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