Dynamic properties of the spin-1/2 XX chain with three-spin interactions

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dc.contributor.authorStolze, Joachim
dc.contributor.authorVerkholyak, Taras
dc.contributor.authorDerzhko, Oleg
dc.contributor.authorKrokhmalskii, Taras
dc.date.accessioned2008-06-09T09:20:08Z
dc.date.available2008-06-09T09:20:08Z
dc.date.issued2008-05-02
dc.description.abstractWe consider a spin-(1/2) XY chain in a transverse (z) field with multisite interactions. The additional terms introduced into the Hamiltonian involve products of spin components related to three adjacent sites. A Jordan–Wigner transformation leads to a simple bilinear Fermi form for the resulting Hamiltonian and, hence, the spin model admits a rigorous analysis. We point out the close relationships between several variants of the model, which were discussed separately in previous studies. The ground-state phases (ferromagnet and two kinds of spin liquid) of the model are reflected in the dynamic structure factors of the spin chains, which are the main focus in this study. First, we consider the zz dynamic structure factor, reporting for this quantity a closed-form expression and analyzing the properties of the two-fermion (particle-hole) excitation continuum, which governs the dynamics of transverse spin component fluctuations and of some other local operator fluctuations. Then we examine the xx dynamic structure factor, which is governed by many-fermion excitations, reporting both analytical and numerical results. We discuss some easily recognized features of the dynamic structure factors, which are signatures of the presence of the three-site interactions.en
dc.identifier.citationVerkholyak, Taras; Derzhko, Oleg; Krokhmalskii, Taras; Stolze, Joachim: Dynamic properties of the spin-1/2 XX chain with three-spin interactions. In: Physical Review B Jg. 77(2008), 174404, doi: 10.1103/PhysRevB.77.174404.de
dc.identifier.doi10.1103/PhysRevB.77.174404
dc.identifier.urihttp://hdl.handle.net/2003/25462
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-3216
dc.identifier.urlhttp://dx.doi.org/10.1103/PhysRevB.77.174404
dc.language.isoende
dc.publisherThe American Physical Societyen
dc.rights©2008 The American Physical Societyen
dc.subject.ddc530
dc.titleDynamic properties of the spin-1/2 XX chain with three-spin interactionsen
dc.typeTextde
dc.type.publicationtypearticlede
dcterms.accessRightsrestricted
eldorado.identifier.urlhttp://t1.physik.tu-dortmund.de/stolze/publications/PRB_77_174404.pdf

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