Heisenberg spin chains with four-spin couplings

ORAL

Abstract

We obtain and analyze the phase diagram of the zigzag Heisenberg spin chain including four-spin interactions arising from ring exchange processes. We perform exact diagonalization of chains up to 24 sites. In addition to the expected ferromagnetic, antiferromagnetic and dimer phases, the phase diagram contains a region of partial spin polarization as well as a region occupied by novel phase(s).

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Authors

  • Alexios Klironomos

    Department of Physics, The Ohio State University, 191 W Woodruff Ave, Columbus OH 43210, USA

  • Julia S. Meyer

    Department of Physics, The Ohio State University, 191 W Woodruff Ave, Columbus OH 43210, USA, The Ohio State University

  • Toshiya Hikihara

    Department of Physics, Hokkaido University, Sapporo 060-0810, Japan

  • Konstantin Matveev

    Materials Science Division, Argonne National Laboratory, Argonne IL 60439, USA