Magnetic order of the CuO2 chains in (Sr,Ca)14Cu 24 O41

U. Schwingenschlögl*, C. Schuster

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We investigate the magnetism of the CuO2 chains in the spin-chain compounds (Ca,Sr)14Cu24O41 by means of LDA+U electronic structure calculations. The study is based on an effective model of two coupled CuO2 chains, which captures the structural prerequisites of the exchange interaction. We determine the total energy of various spin configurations on coupled CuO2 chains. In particular, we find that the ground state of Ca-rich spin-chain compounds is given by an antiferromagnetic intrachain spin order with 4kF-periodic charge order, complemented by likewise antiferromagnetic interchain ordering.

Original languageEnglish (US)
Article number27003
JournalEPL
Volume79
Issue number2
DOIs
StatePublished - Jul 1 2007
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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