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Dynamically generated Mott gap from holography.

Mohammad Edalati1, Robert G Leigh, Philip W Phillips

  • 1Department of Physics, University of Illinois at Urbana-Champaign, 61801, USA.

Physical Review Letters
|March 17, 2011
PubMed
Summary
This summary is machine-generated.

A dipole interaction in holographic systems can alter fermion behavior. Increasing interaction strength shifts spectral weight and can dynamically create a Mott gap in the density of states.

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Area of Science:

  • Theoretical Physics
  • Condensed Matter Physics
  • Holographic Duality

Background:

  • Fermions in holographic systems often exhibit non-minimal couplings to gravity and gauge fields.
  • Understanding these interactions is key to exploring emergent phenomena in quantum field theory.

Purpose of the Study:

  • To investigate the impact of a specific non-minimal coupling, the Pauli (dipole) interaction, on fermion properties within holographic models.
  • To analyze how this interaction affects fermion correlators and the density of states.

Main Methods:

  • Theoretical analysis of fermion correlators in holographic systems.
  • Examination of the fermion spectral density under varying dipole interaction strengths.

Main Results:

  • The dipole interaction significantly modifies the fermion spectral density.
  • Spectral weight is transferred between energy bands as interaction strength increases.
  • A critical interaction strength leads to the emergence of a gap in the fermion density of states.

Conclusions:

  • The Pauli interaction can dynamically induce a Mott gap without spontaneous symmetry breaking.
  • This finding offers insights into the emergence of gaps in strongly correlated fermionic systems.