University of Minnesota
School of Physics & Astronomy

Condensed Matter Seminar

Wednesday, September 28th 2016
2:30 pm:
Condensed Matter Seminar in Physics 110 PAN
Speaker: Arun Bansil, Northeastern University, Boston
Subject: Miracle of topological phases of quantum matter: From Schrödinger to Einstein

The revolution started by the discovery of topological insulators a few years ago has turned out to be the proverbial tip of the much larger iceberg of exotic phases of quantum matter driven by spin-orbit coupling effects. Consideration of electronic states protected by time-reversal, crystalline and particle-hole symmetries has led to the prediction of many novel materials, which can support Weyl, Dirac and Majorana fermions, and to new types of insulators such as topological crystalline insulators and topological Kondo insulators, as well as quantum spin Hall insulators with large band gaps capable of surviving room temperature thermal excitations. [1] I will discuss our recent theoretical work aimed at predicting topological materials and identify cases where robust experimental evidence has been obtained toward their successful materials realization. [2-10] I will also comment on potential of topological materials as next generation platforms for manipulating spin and charge transport and other applications.

[1] Bansil, Lin and Das, Reviews of Modern Physics 88, 021004 (2016).
[2] Chang et al, Science Advances 2, e1600295 (2016).
[3] Huang et al., Proc. National Academy of Sciences 113, 1180 (2016).
[4] Zheng et al., ACS Nano 10, 1378 (2016).
[5] Xu et al., Science 349, 613 (2015).
[6] Zeljkovic et al., Nature Materials 14, 318 (2015).
[7] He et al., Nature Materials 14, 577 (2015).
[8] Xu et al., Nature Physics 11, 748 (2015).
[9] Crisostomo et al., Nano Letters 15, 6568 (2015).
[10] Xu et al., Science Advances 1, e1501092 (2015).

Faculty Host: Martin Greven

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