Video URL

https://pirsa.org/20080020

Temperature enhancement of thermal Hall conductance quantization

Mross, D. (2020). Temperature enhancement of thermal Hall conductance quantization. Perimeter Institute for Theoretical Physics. https://pirsa.org/20080020

Mross, David. Temperature enhancement of thermal Hall conductance quantization. Perimeter Institute for Theoretical Physics, Aug. 04, 2020, https://pirsa.org/20080020 

          @misc{ scivideos_PIRSA:20080020,
            doi = {10.48660/20080020},
            url = {https://pirsa.org/20080020},
            author = {Mross, David},
            keywords = {Quantum Matter},
            language = {en},
            title = {Temperature enhancement of thermal Hall conductance quantization},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2020},
            month = {aug},
            note = {PIRSA:20080020 see, \url{https://scivideos.org/pirsa/20080020}}
          }

David Mross Weizmann Institute of Science

DOI 10.48660/20080020
Source Repository PIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

The quest for non-Abelian quasiparticles has inspired decades of experimental and theoretical efforts. Among their clearest signatures is a thermal Hall conductance with quantized half-integer value. Such a value was indeed recently observed in a quantum-Hall system at ν=5/2 and in the magnetic insulator α-RuCl3. I will explain that a non-topological "thermal metal" phase that forms due to quenched disorder may disguise as a non-Abelian phase by well approximating the trademark quantized thermal Hall response. Remarkably, the quantization here improves with temperature, in contrast to fully gapped systems. In my talk, I will provide analytical and numerical evidence for this effect and discuss its possible implications for the aforementioned experiments.