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           14:00 - 15:00     Weekly Seminar
HEPCo Group
A Weyl Semimetal from AdS/CFT

School
PHYSICS

Abstract:

We construct a top-down holographic model of Weyl semimetal states from the AdS/CFT correspondence. In the presence of a constant external axial gauge field in a spatial direction, we find the defining characteristic of a Weyl semi-metal: a quantum phase transition from a topological state with non-zero anomalous Hall conductivity to a trivial insulator. The transition is first order. We also compute entropy, heat capacity, and speed of sound, and find a peak. Our model allows for calculation of the DC conductivity in a constant electric field, with interesting results. Based on arXiv: 2012.11434.