Phenomenological characterisation of semi-holographic non-Fermi liquids

Ayan Mukhopadhyay (1) , Giuseppe Policastro (2)

1 CPHT - Centre de Physique Théorique [Palaiseau]
2 LPTENS - Laboratoire de Physique Théorique de l'ENS [École Normale Supérieure]

We analyse some phenomenological implications of the most general semi-holographic models for non-Fermi liquids that have emerged with inputs from the holographic correspondence. We find generalizations of Landau-Silin equations with few parameters governing thermodynamics, low energy response and collective excitations. We show that even when there is a Fermi surface with well-defined quasi-particle excitations, the collective excitations can behave very differently from Landau's theory.

Domaines: Autre [cond-mat.other]; Physique des Hautes Energies - Théorie [hep-th]

Ayan Mukhopadhyay, Giuseppe Policastro. Phenomenological characterisation of semi-holographic non-Fermi liquids. Physical Review Letters, 2013, 111, pp.221602. ⟨hal-00844779⟩