Special 290S/290K Quantum Materials Seminar speaker Glen Wagner (University of Zurich) Thursday, March 30 at 2 pm in 325 Physics South

Time/Venue Thursday, March 30 at 2 pm in Pacific time in Physics South 325 and via Zoom:
https://berkeley.zoom.us/j/99523499113pwd=REovb3pyam03WXQwbEhrU3dqNHZvdz09
Meeting ID: 995 2349 9113 Passcode: 600704
Host Bartholomew Andrews, Zaletel Group
Title s-wave paired composite fermions in quantum Hall bilayers. 
Abstract The half-filled Landau level is well described by a Fermi
liquid of composite fermions: two flux quanta attached to each electron
to form a composite object that feels no magnetic field. We study the
scenario where two half-filled Landau levels are brought closer and
closer together. This results in pairing between the composite fermions.
Using a trial wavefunction for s-wave pairing of composite fermions and
comparing to exact diagonalization, we deduce that the system undergoes
a BEC-BCS crossover as the distance between the two half-filled Landau
levels varies.