Authors: Stolze, Joachim
Verkholyak, Taras
Derzhko, Oleg
Krokhmalskii, Taras
Title: Dynamic properties of the spin-1/2 XX chain with three-spin interactions
Language (ISO): en
Abstract: We 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.
Publishers Link:
Issue Date: 2008-05-02
Provenance: The American Physical Society
Citation: Verkholyak, 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.
Appears in Collections:Stolze, Joachim Prof. Dr.

Files in This Item:
There are no files associated with this item.

This item is protected by original copyright

Items in Eldorado are protected by copyright, with all rights reserved, unless otherwise indicated.