Commensurate-incommensurate transition and associated collective modes in the stripe state of cuprates near 1/8 hole-doping

TL;DR

This paper investigates the stripe phase in hole-doped cuprates near 1/8 doping, focusing on the commensurate-incommensurate transition and collective modes, using a Ginzburg-Landau model to connect theory with experimental observations.

Contribution

It introduces a Ginzburg-Landau framework to analyze the transition and collective excitations in cuprate stripe phases, providing quantitative estimates aligned with experiments.

Findings

Calculated the commensurate-incommensurate transition point.

Estimated the phason gap and its impact on dielectric properties.

Linked collective mode energies to experimental parameters.

Abstract

We analyze the anomalous behavior in hole-doped cuprates near 1/8 doping in terms of the commensurate-incommensurate transition of a stripe phase. Based on an effective Ginzburg-Landau theory appropriate for weak pinning, we calculate the commensurate-incommensurate transition point and the energies of the phason and amplitudon collective modes. Using experimentally available parameters, we estimate the phason gap (pinning frequency), the conductivity and the contribution of the phason mode to the dielectric function.