Nonuniversal ordering of spin and charge in stripe phases

F Kruger, S Scheidl

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

We study the interplay of topological excitations in stripe phases: charge dislocations, charge loops, and spin vortices. In two dimensions these defects interact logarithmically on large distances. Using a renormalization-group analysis in the Coulomb-gas representation of these defects, we calculate the phase diagram and the critical properties of the transitions. Depending on the interaction parameters, spin and charge order can disappear at a single transition or in a sequence of two transitions (spin-charge separation). These transitions are nonuniversal with continuously varying critical exponents. We also determine the nature of the points where three phases coexist.

Original languageEnglish
Pages (from-to)095701
Number of pages4
JournalPhysical Review Letters
Volume89
Issue number9
DOIs
Publication statusPublished - 26 Aug 2002

Keywords

  • CUPRATE SUPERCONDUCTORS
  • 2 DIMENSIONS
  • FLUCTUATIONS
  • LA2-XSRXNIO4
  • MAGNETISM
  • MODEL

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