2022-03-30 Seminar Report

The Quantum Matter Study Group invited Dr. Tiantian Zhang from Tokyo Institute of Technology to talk about the local and global topology for Tg-protected Z2 Dirac points. In the beginning, by introducing the topological phase in the gapped and gapless systems, she discussed the conventional and Z2 Dirac points. Surprisingly, she established gauge-invariant charge formula and bulk-surface correspondence for Z2 Dirac points, which can give a full understanding about the topology of Tg-protected Z2 Dirac points. Then, she proposed the first Z2 Dirac material candidate Li2B4O7 for further exploration.

Reported by Congcong Le

Related Event