Princeton University

School of Engineering & Applied Science

Magnetic and Electric Edge States in magnetically modulated two dimensional electron systems

Professor Sankalpa Ghosh, Indian Institute of Technology, Delhi
E-Quad B205
Monday, March 20, 2017 - 1:30pm

The occurrence of edge states and the bulk-edge correspondence is crucial to our understanding of the physics of Quantum Hall Systems and more recently of Topological Insulators. Two dimensional electron gas (2DEG) exposed to spatially varying magnetic fields can support chiral current carrying states due to magnetic field gradients which are magnetic equivalent of the conventional edge states, but now formed in the two dimensional bulk of a quantum Hall system. These are called magnetic edge states. In this talk we shall discuss the interplay between such magnetic and conventional electric edge states in 2DEG and its experimental implications.