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).

*This work was supported by the U. S. Department of Energy, Office of Science, under Contract No.~ DE-AC02-06CH11357. Part of the calculations were performed at the Ohio Supercomputer Center thanks to a grant of computing time.

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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