Magnon supersolid and anomalous hysteresis in spin dimers on a triangular lattice

Daisuke Yamamoto, Ippei Danshita

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We study the magnetic phase diagram and hysteresis behavior of weakly coupled spin dimers on a triangular lattice using the cluster mean-field method with cluster-size scaling. We find that the magnetization curve has plateaus at 1/3 and 2/3 of the total magnetization, in which local singlet and triplet states form a superlattice pattern. Moreover, if increasing (decreasing) the magnetic field from the 1/3 (2/3) plateau, the Bose-Einstein condensation (BEC) of triplons occurs on the superlattice background, leading to the transition into "magnon supersolid" phase. We also find that the first-order transition between these solid states and the standard magnon BEC state exhibits an anomalous hysteresis upon cycling the magnetic field; the transition can occur only from solid to BEC, and the system cannot return to the initial solid state in the reverse process.

Original languageEnglish
Article number014419
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume88
Issue number1
DOIs
Publication statusPublished - 2013 Jul 19
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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