Model for continuous thermal metal to insulator transition
Abstract
We propose a d-dimensional interacting Majorana fermion model with quenched disorder, which gives us a continuous quantum phase transition between a diffusive thermal metal phase with a finite entropy density to an insulator phase with zero entropy density. This model is based on coupled Sachdev-Ye-Kitaev model clusters, and hence has a controlled large-N limit. The metal-insulator transition is accompanied by a spontaneous time-reversal symmetry breaking. We perform controlled calculations to show that the energy diffusion constant jumps to zero discontinuously at the metal-insulator transition, while the time-reversal symmetry-breaking order parameter increases continuously. © 2017 American Physical Society.
Date Published
Journal
Physical Review B
Volume
96
Issue
11
URL
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85030096613&doi=10.1103%2fPhysRevB.96.115122&partnerID=40&md5=3624a293738efedc98f3912b58cef169
DOI
10.1103/PhysRevB.96.115122
Research Area
Group (Lab)
Chao-Ming Jian Group
Funding Source
1151208