2003/09/30 by P. Lecheminant, E. Orignac · 2 citations
Physics and Astronomy · #Condensed matter physics #Magnetic field #Magnetization #Mathematical physics #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum many-body systems #Quantum mechanics #Theoretical and Computational Physics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.69.174409
5 pages, revised version
arxiv created 2004/04/27 · openalex publication_date 2004/05/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The stability of the magnetization m=1/3 plateau phase of the XXZ spin-(1)/(2) Heisenberg chain with competing interactions is investigated upon switching on a staggered transverse magnetic field. Within a bosonization approach, it is shown that the low-energy properties of the model are described by an effective two-dimensional XY model in a threefold symmetry-breaking field. A phase transition in the three-state Potts universality class is expected separating the m=1/3 plateau phase to a phase where the spins are polarized along the staggered magnetic field. The Z3 critical properties of the transition are determined within the bosonization approach.