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Superconductivity of repulsive spinless fermions with sublattice potentials | | Yuchi He
; Kang Yang
; Jonas B. Hauck
; Emil J. Bergholtz
; Dante M. Kennes
; | | Date: |
4 Aug 2022 | | Abstract: | We explore unconventional superconductivity of repulsive spinless fermions on
square and honeycomb lattices with staggered sublattice potentials. The two
lattices can exhibit staggered $d$-wave and $f$-wave pairing respectively at
low doping stemming from an effective two-valley band structure. At higher
doping, in particular the square lattice displays a much richer phase diagram
including topological $p+ip$ superconductivity which is induced by a
qualitatively different mechanism compared to the $d$-wave pairing. We
illuminate this from several complementary perspectives: we analytically
perform sublattice projection to analyze the effective continuum low-energy
description and we numerically calculate the binding energies for pair and
larger bound states for few-body doping near half filling. Furthermore, for
finite doping, we present phase diagrams based on extensive FRG and and DMRG
calculations. | | Source: | arXiv, 2208.02830 | | Services: | Forum | Review | PDF | Favorites | |
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