String order in spin liquid phases of spin ladders

Details String order in spin liquid phases of spin ladders String order in spin liquid phases of spin ladders

Publishing date

2003-09-16

URL

arxiv.org/abs/cond-mat/0309377v1

Journals

Physical Review B 63, 134403 (2001)

Science

Physics

Field

Condensed Matter

SubField

Strongly Correlated Electrons

Type

Scientific paper

Digital Object Identifier

10.1103/PhysRevB.63.134403

Abstract

Two-leg spin ladders have a rich phase diagram if rung, diagonal and plaquette couplings are allowed for. Among the possible phases there are two Haldane-type spin liquid phases without local order parameter, which differ, however, in the topology of the short range valence bonds. We show that these phases can be distinguished numerically by two different string order parameters. We also point out that long range string- and dimer orders can coexist.

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