Yuan-Ming Lu, The Ohio State University, Tunable Surface States of Topological Materials

Date: Mon. March 19th, 2018, 12:45 pm-1:45 pm
Location: Rockefeller 221 (Les Foldy Room)
Website: https://physics.osu.edu/people/lu.1435

Tunable Surface States of Topological Materials

Yuan-Ming Lu, The Ohio State University

 

The discovery of topological insulators revealed a large class of topological materials, which exhibit novel surface states with unusual properties. I will discuss some recent progress in engineering surface states of topological materials, focusing on two different systems. The 1^st class of materials is three-dimensional Dirac semimetals including Na3Bi and Cd3As2, whose topological surface states can be deformed in these materials by either doping or applying mechanical strain. The 2^nd class of materials are spin-orbit coupled quantum magnets, which can host topological magnon surface states robust again disorders. I’ll discuss the zigzag magnetic order in layered \alpha-RuCl3 as one example, where chiral magnon surface states can be achieved by applying magnetic field.