Correlation between charge order and second-neighbor hopping in cuprate superconductors

TL;DR

This study explores how the second-neighbor hopping parameter t' influences charge-order wave vectors in cuprate superconductors, revealing that variations in t' can explain differences observed across different cuprate families.

Contribution

It demonstrates a direct correlation between t' and Q_{CD} within the t-t'-J model, linking microscopic parameters to experimental charge-order variations.

Findings

Q_{CD} increases with t'

Differences in Q_{CD} among cuprates are due to varying t' values

Provides a microscopic explanation for charge-order differences

Abstract

The correlation between the charge-order wave vector Q_{CD} and second-neighbor hopping t' in cuprate superconductors is studied based on the t-t'-J model. It is shown that the magnitude of the charge-order wave vector Q_{CD} increases with the increase of t', and then the experimentally observed differences of the magnitudes of the charge-order wave vector Q_{CD} among the different families of cuprate superconductors at the same doping concentration can be attributed to the different values of t'.