Pomeranchuk instabilities in holographic metals

2020
37 pages
Published in:
  • JHEP 05 (2021) 206,
  • JHEP 21 (2020) 206
  • Published: May 21, 2021
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Abstract: (Springer)
We develop a method to detect instabilities leading to nematic phases in strongly coupled metallic systems. We do so by adapting the well-known Pomeranchuk technique to a weakly coupled system of fermions in a curved asymptotically AdS bulk. The resulting unstable modes are interpreted as corresponding to instabilities on the dual strongly coupled holographic metal. We apply our technique to a relativistic 3 + 1-dimensional bulk with generic quartic fermionic couplings, and explore the phase diagram at zero temperature for finite values of the fermion mass and chemical potential, varying the couplings. We find a wide region of parameters where the system is stable, which is simply connected and localized around the origin of coupling space.
Note:
  • Replaced by final version, published in JHEP
  • AdS-CFT Correspondence
  • Holography and condensed matter physics (AdS/CMT)
  • fermion: coupling
  • potential: chemical
  • temperature: 0
  • stability
  • strong coupling
  • duality: holography
  • metal
  • critical phenomena