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

Daisuke Yamamoto*, Ippei Danshita

*この研究の対応する著者

研究成果: Article査読

15 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号014419
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
88
1
DOI
出版ステータスPublished - 2013 7月 19
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 電子材料、光学材料、および磁性材料

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