Anomalies in Weyl semimetals

Speaker: Gyanti Prakash Moharana

Venue : HSB 209

Date : 28th September, 2018

Time: 5:30 PM

Abstract

Symmetries are Holy Grail of physics and so are the conservative laws. However these symmetries /conservation laws can be broken at the quantum mechanical level. This is known as quantum anomaly. This exotic physics was proposed in the realm of Quantum Field Theory and has been realized recently in the new class of materials called Weyl semi metals. These materials harbor fundamental particles called Weyl Fermions which exhibit the so called chiral (Axial) anomaly under certain circumstances where spin is not conserved, vindicating a long-predicted effect in high-energy physics. In addition to this, I would like to discuss recently found gravitational analogue of curved space time and its contribution to the chiral anomaly in Weyl semimetal. I shall discuss how the condensed matter experiments provide the tantalizing evidence to verify the theoretical prediction that has eluded the physics community for years.

About the speaker

Gyanti Prakash Moharana is a research scholar of Dept. of Physics. He is working with Dr. N Harish Kumar on the magnetic resonance study of Magnetic Semiconductor and Topological Insulator.