PIRSA:22080000

Video URL

https://pirsa.org/22080000

From single-gap to multi-gap topological materials

Monserrat, B. (2022). From single-gap to multi-gap topological materials. Perimeter Institute for Theoretical Physics. https://pirsa.org/22080000

Monserrat, Bartomeu. From single-gap to multi-gap topological materials. Perimeter Institute for Theoretical Physics, Aug. 26, 2022, https://pirsa.org/22080000 

          @misc{ scivideos_PIRSA:22080000,
            doi = {10.48660/22080000},
            url = {https://pirsa.org/22080000},
            author = {Monserrat, Bartomeu},
            keywords = {Quantum Matter},
            language = {en},
            title = {From single-gap to multi-gap topological materials},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2022},
            month = {aug},
            note = {PIRSA:22080000 see, \url{https://scivideos.org/pirsa/22080000}}
          }

Bartomeu Monserrat University of Cambridge

Talk numberPIRSA:22080000
DOI10.48660/22080000
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

Topology has become a powerful tool to classify and understand materials. The standard paradigm divides the energy bands into two groups separated by a gap, or with at most some low-dimensional band crossings. Single-gap topological materials include topological insulators, Chern insulators, and topological semimetals. Recent work has extended these ideas to multi-gap systems, in which the energy bands are separated into three or more groups. The resulting phases can be characterized using the Euler class, and exhibit some interesting properties such as non-Abelian charges in the bulk.

In this talk, I will describe our work using first principles calculations to explore topological phases in materials, including both electronic and phononic spectra. In the context of single-gap topology, I will describe the interplay between temperature and topology in electronic systems; while in the context of multi-gap topology, I will present the manipulation of non-Abelian band nodes in phononic systems.

Zoom Link: https://pitp.zoom.us/j/93085720537?pwd=RlhrVFJZU1RmY284Nm5xUXRJakdMZz09