Microscopic model calculations for the magnetization process of layered triangular-lattice quantum antiferromagnets

Daisuke Yamamoto, Giacomo Marmorini, Ippei Danshita

研究成果: Article査読

50 被引用数 (Scopus)

抄録

Magnetization processes of spin-1/2 layered triangular-lattice antiferromagnets (TLAFs) under a magnetic field H are studied by means of a numerical cluster mean-field method with a scaling scheme. We find that small antiferromagnetic couplings between the layers give rise to several types of extra quantum phase transitions among different high-field coplanar phases. Especially, a field-induced first-order transition is found to occur at H≈0.7Hs, where Hs is the saturation field, as another common quantum effect of ideal TLAFs in addition to the well-established one-third plateau. Our microscopic model calculation with appropriate parameters shows excellent agreement with experiments on Ba3CoSb2O9 [T. Susuki et al., Phys. Rev. Lett. 110, 267201 (2013)]. Given this fact, we suggest that the Co2+-based compounds may allow for quantum simulations of intriguing properties of this simple frustrated model, such as quantum criticality and supersolid states.

本文言語English
論文番号027201
ジャーナルPhysical Review Letters
114
2
DOI
出版ステータスPublished - 2015 1 16
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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