Dynamically Generated Mott Gap from Holography

Mohammad Edalati, Robert G. Leigh, and Philip W. Phillips
Phys. Rev. Lett. 106, 091602 – Published 1 March 2011

Abstract

In the fermionic sector of top-down approaches to holographic systems, one generically finds that the fermions are coupled to gravity and gauge fields in a variety of ways, beyond minimal coupling. In this Letter, we take one such interaction—a Pauli, or dipole, interaction—and study its effects on fermion correlators. We find that this interaction modifies the fermion spectral density in a remarkable way. As we change the strength of the interaction, we find that spectral weight is transferred between bands, and beyond a critical value, a gap emerges in the fermion density of states. A possible interpretation of this bulk interaction then is that it drives the dynamical formation of a (Mott) gap, in the absence of continuous symmetry breaking.

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  • Received 19 October 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.091602

© 2011 American Physical Society

Authors & Affiliations

Mohammad Edalati, Robert G. Leigh, and Philip W. Phillips

  • Department of Physics, University of Illinois at Urbana-Champaign, Urbana Illinois 61801, USA

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Issue

Vol. 106, Iss. 9 — 4 March 2011

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