Competing superconducting instabilities in the one-dimensional p-band degenerate cold fermionic system

V. Bois, S. Capponi, P. Lecheminant, and M. Moliner
Phys. Rev. B 92, 075140 – Published 26 August 2015

Abstract

The zero-temperature phase diagram of a p-orbital two-component fermionic system loaded into a one-dimensional optical lattice is mapped out by means of analytical and numerical techniques. It is shown that the p-band model away from half-filling hosts various competing superconducting phases for attractive and repulsive interactions. At quarter-filling, we analyze the possible formation of incompressible Mott phases and in particular for repulsive interactions, we find the occurrence of a Mott transition with the formation of fully gapped bond-ordering waves.

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  • Received 3 June 2015
  • Revised 22 July 2015

DOI:https://doi.org/10.1103/PhysRevB.92.075140

©2015 American Physical Society

Authors & Affiliations

V. Bois1, S. Capponi2, P. Lecheminant1, and M. Moliner3

  • 1Laboratoire de Physique Théorique et Modélisation, CNRS UMR 8089, Université de Cergy-Pontoise, Site de Saint-Martin, F-95300 Cergy-Pontoise Cedex, France
  • 2Laboratoire de Physique Théorique, CNRS UMR 5152, Université Paul Sabatier, F-31062 Toulouse, France
  • 3IPCMS (UMR 7504) and ISIS (UMR 7006), Université de Strasbourg et CNRS, Strasbourg, France

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Vol. 92, Iss. 7 — 15 August 2015

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