SOLID STATE & STRUCTURAL CHEMISTRY UNIT
INDIAN INSTITUTE OF SCIENCE
BANGALORE – 560 012
Dr. Awadesh Narayan
ETH Zürich, Wolfgang-Pauli-Strasse 27
Engineering Quantum Materials: A Tale of Tunable Dirac Points and Multiferroic Quantum Criticality
Date & Time : Monday 27th August, 2018 at 4:00 PM
Venue : SSCU Auditorium
Quantum materials are systems whose properties are governed by quantum behavior and provide a common thread linking frontiers of physics, chemistry, materials science and engineering. In this talk, I will give two examples from our recent work demonstrating intriguing properties of such systems. In the first part, I will focus on emerging three-dimensional topological Dirac materials and describe strategies to engineer the creation, motion and annihilation of Dirac points using alloying  and light .
In the second part of the talk, I will present a special kind of phase transition that can occur at low temperatures by tuning a non-thermal control parameter and is the driver for exotic quantum phenomena that extend to elevated temperatures. I will present the concept of multiferroic quantum criticality — in which both magnetic and ferroelectric quantum phase transitions occur in the same system — that we have recently introduced . I will describe the associated experimental signatures and material systems to realize it, and highlight possible future directions.
 A. Narayan, D. Di Sante, S. Picozzi, and S. Sanvito, Phys. Rev. Lett. 113, 256403 (2014).
 A. Narayan, Phys. Rev. B 91, 205445 (2015).
 A. Narayan, A. V. Balatsky, and N. A. Spaldin, arXiv:1711.07989 (under review).
ALL ARE CORDIALLY INVITED TO ATTEND
Coffee/Tea : 3.30-3.45 PM