Speaker: Prof. Ching-Hao Chang,. National Cheng-Kung University 

Time: 1:30PM, 11/3, 2020

Place: 019 Lecture room, Physics Department, NTHU.

Title: Curve bilayer graphene to create new Hall effects in zero magnetic field

Abstract:
The ability to engineer the electronic band structure and, more strikingly, to access new exotic phase of matter has been the cornerstone of the advance of science and technology. Here, we present (both theory and measurement) a new route to create non-trivial band structure that can realize an artificially corrugated bilayer graphene wherein the real-space and momentum-space pseudo-magnetic fields (Berry curvatures) coexist and have nontrivial properties, namely, the Berry curvature dipole. This new class of condensed-matter systems enables us to observe the so-called nonlinear anomalous Hall effect and a new type of Hall effect without breaking the time-reversal symmetry. 

Online broadcast via ZOOM https://zoomtw.zoom.us/j/91562831185