Condensed Matter Physics, 2009, vol. 12, No. 3, pp. 429-434

Title: Field-controlled spin current in frustrated spin chains
  A.K. Kolezhuk (Institut für Theoretische Physik C, RWTH Aachen University, 52056 Aachen, Germany;
Institute of Magnetism, National Academy of Sciences and Ministry of Education, 03142 Kyiv, Ukraine)
  I.P. McCulloch (Department of Physics, University of Queensland, Brisbane QLD 4072, Australia)

We study states with spontaneous spin current, emerging in frustrated antiferromagnetic spin-S chains subject to a strong external magnetic field. As a numerical tool, we use a non-Abelian symmetry realization of the density matrix renormalization group. The field dependence of the order parameter and the critical exponents are presented for zigzag chains with S=1/2, 1, 3/2, and 2.

Key words: vector chirality, zigzag chain, magnetic field
PACS: 75.10.Pq, 75.40.Cx, 75.40.Mg
Comments: Figs. 2, Refs. 30, Tabs. 0

Full text [pdf , ps] << List of papers