Metallic and Insulating Phases in Two-Dimensional Strongly-Coupled Field Theories With a Gravitational Dua

Matthew Stephenson

doi:10.20944/preprints202305.2150.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 30 May 2023 / Approved: 30 May 2023 / Online: 30 May 2023 (13:17:48 CEST)

We consider a specific holographic model in the limit where the gauge field does not couple to the rest of of the holographic fields (gravity and scalar sector) and investigate a phase of matter at zero charge density, a realistic feature that may have implications for disordered strange metals. We then pick a specific form of the gauge coupling $Z(\alpha)$ with a certain disorder realization and argue that this provides a hard-gapped insulator with exponentially-suppressed conductivity by holographic methods. The limit is non-trivial: as there is backreaction at zero density amount, surviving in the coupled case.

Physical Sciences, Theoretical Physics

Comment 1

Received: 2 June 2023
Commenter: Nathan Seiberg
The commenter has declared there is no conflict of interests.

Comment: Very interesting.

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Metallic and Insulating Phases in Two-Dimensional Strongly-Coupled Field Theories With a Gravitational Dua

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