Dominant superconducting correlations in a Luttinger liquid induced by spin fluctuations

Niels Henrik Aase; Asle Sudbø

doi:10.1103/PhysRevB.106.L241102

← Back to search

Dominant superconducting correlations in a Luttinger liquid induced by spin fluctuations

Niels Henrik Aase, Asle Sudbø

DOI 10.1103/PhysRevB.106.L241102 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We study spin-fluctuation mediated divergent superconducting fluctuations in a Luttinger liquid proximity-coupled to a spin chain. Our study provides insight into how spin fluctuations can induce superconductivity in a strongly correlated non-Fermi liquid with repulsive electronic interactions only. The electrons in the system are governed by the Extended Hubbard Hamiltonian and are coupled to a chain of localized spins modeled by the spin-12XX Hamiltonian. Using a multichannel Luttinger liquid approach, we determine the phase diagram of the metal chain. We find that spin-polarized triplet superconducting correlations persist for repulsive electronic interactions for sufficiently large interchain couplings.