Induced Order in Nonequivalent Two-Leg Hubbard Ladder

TL;DR

This paper investigates how interchain hopping influences order induction in a two-leg Hubbard ladder, revealing that increased hopping enhances induced order but suppresses original order, with implications for multilayered high-temperature superconductors.

Contribution

It introduces a combined DMRG and mean-field approach to study order induction in nonequivalent Hubbard chains, highlighting the control of order strength by interchain hopping.

Findings

Interchain hopping controls induced and original order magnitudes.

Induced order decreases as original order increases.

Results have implications for multilayered superconducting systems.

Abstract

Motivated by the presence of different orders in multilayered high-temperature superconductors, we examine a model consisting of nonequivalent two Hubbard chains coupled by interchain hopping by using the density-matrix renormalization group (DMRG) and a mean-field theory. As an example, we consider a system with noninteracting chain without order and a Hubbard chain with strong spin-density-wave correlation. We find that the magnitude of the interchain hopping controls the strength of induced order as well as that of original order and its fluctuation. It is also found that the induced order decreases with increasing the magnitude of the original order. Implications to the multilayered system are discussed.