Greetings from Bangkok.
Welcome to hybrid seminars in condensed matter physics at Mahidol University. The seminars are informal and meant to inspire discussions. If you would like to participate, please sign up to receive seminar announcements or contact us at kitinan.pon@mahidol.ac.th.
The seminars start at 13:00 (Thailand time) every Wednesday, unless otherwise announced.
Upcoming Seminar
03.09.2025 (Exp.)
Speaker: Curtis Vidura Mcdowell (Chula)
Time: 13:00-14:00 (Thailand time)
Venue: online
Title: Fabry–Pérot Interferometry in Large Angle Twisted Bilayer Graphene
Abstract: In this talk, I will discuss the electronic properties of large-angle twisted bilayer graphene (tBLG). Since the Dirac cones are widely separated in k-space, the two layers are effectively decoupled, acting like two monolayer graphene sheets, despite being atomically close. This enables layer-independent Fabry–Pérot cavities which results in resistance fringes in bipolar regions. In our device, we also observe additional, multiple unexpected oscillations that either depend on carrier density and the global back-gate voltage. I will present a model that captures many of these features by incorporating a simple smooth doping profile, perhaps arising from disorder, and I will show that some of these oscillations are further enhanced at small, nonzero magnetic fields.