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Journal of the Physical Society of Japan

Triplet Superconductivity in the One-Dimensional Hubbard Model with Modulated Kinetic Hopping at Weak Coupling

Hanqin Ding, Jun Zhang

Published Nov 9, 2015• 1 citation
Publisher

Abstract

We construct a theoretical model for one-dimensional interacting electrons by modulating electronic kinetic hopping in the weak-coupling regime. The use of bosonization and renormalization group analysis allows us to obtain the phase diagram. The induced three-body attraction gives rise to a triplet superconducting phase in the ground state.

DOI
10.7566/jpsj.84.124703

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We construct a one-dimensional (1D) theoretical model to clarify the occurrence of superconductivity. The weak-coupling (WC) theory allows a determination of the phase diagram. The constrained hopping induces additional two-body and three-body interactions. At half-filling, the three-body interaction is responsible for the triplet superconducting (TS) correlation. Away from half-filling, the two-body interaction works, favoring the singlet superconducting (SS) correlation. The results are expected to provide an insignificant insight into the superconductivity mechanism.
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