Charge Density Wave in Sr\(_{14-x}\)Ca\(_x\)Cu\(_{24}\)O\(_{41}\)

Recent experimental results [A. Rusydi et al., Phys. Rev. Lett. 97, 016403 (2006)] revealed the stability of a peculiar charge density wave (CDW) with odd period (three or five) in the coupled Cu\(_2\)O\(_5\) spin ladders in Sr\(_{14-x}\)Ca\(_x\)Cu\(_{24}\)O\(_{41}\), while the CDW with even period...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2010-06
Main Authors: Wohlfeld, Krzysztof, Oleś, Andrzej M, Sawatzky, George A
Format: Article
Language:English
Subjects:
Calcium
Charge density waves
Charge transfer
Ladders
Strontium
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Recent experimental results [A. Rusydi et al., Phys. Rev. Lett. 97, 016403 (2006)] revealed the stability of a peculiar charge density wave (CDW) with odd period (three or five) in the coupled Cu\(_2\)O\(_5\) spin ladders in Sr\(_{14-x}\)Ca\(_x\)Cu\(_{24}\)O\(_{41}\), while the CDW with even period is unstable. Here we resolve this contradiction by solving the effective t-J model for the two coupled chains supplemented by the intersite interaction term V. Crucial to this finding is the novel interaction term V (responsible for the interladder repulsion between nearest neighbor holes), which is derived from the on-site Hubbard-like repulsion between electrons on the same oxygen sites but within two distinct orbitals which belong to two neighboring Cu\(_2\)O\(_5\) ladders in the charge transfer model.
ISSN:2331-8422
DOI:10.48550/arxiv.1006.4851