Dynamically generated Mott gap from holography

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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.

Original languageEnglish (US)
Article number091602
JournalPhysical review letters
Issue number9
StatePublished - Mar 1 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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