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Frustrated ground states of a generalized XY model and their mapping to nonmagnetic structural analogs

机译:广义XY模型的受挫基态及其映射到非磁性结构类似物

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摘要

Ground-state phases of a generalized XY model with magnetic and generalized nematic couplings on a nonbipartite triangular lattice are investigated in the exchange interactions parameter space. We demonstrate that the model displays a number of ordered and quasiordered phases as a result of geometrical frustration and/or competition between the magnetic and the generalized nematic interactions. The nature and the extent of the respective phases depend on the parameter q that characterizes the higher-order harmonics term in the Hamiltonian. Motivated by a recent discovery of the experimental realization of the model with q = 2 in a seemingly unrelated field of the system chemistry [ A. B. Cairns, M. J. Cliffe, J. A. M. Paddison, D. Daisenberger, M. G. Tucker, F.-X. Coudert, and A. L. Goodwin, Nature Chemistry 8, 442 (2016)], the model with q ≥ 2 is discussed in the context of the prediction of structural phases of a class of bimetallic cyanides based on a mapping between the two systems.
机译:在交换相互作用参数空间中研究了在非二分三角形晶格上具有磁和广义向列耦合的广义XY模型的基态相位。我们证明,由于几何受挫和/或电磁和广义向列相互作用之间的竞争,模型显示了许多有序和准有序的相。各个相的性质和程度取决于参数q,该参数表征哈密顿量中的高次谐波项。受最近发现的在系统化学看似无关的领域中q = 2的模型的实验实现的推动[A. B. Cairns,M。J. Cliffe,J。A. M. Paddison,D。Daisenberger,M。G. Tucker,F.-X。 Coudert和A. L. Goodwin,Nature Chemistry 8,442(2016)]中,基于两个系统之间的映射关系,在预测一类双金属氰化物的结构相的背景下讨论了q≥2的模型。

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  • 来源
    《Physical review》 |2016年第1期|014438.1-014438.9|共9页
  • 作者

    Milan Zukovic;

  • 作者单位

    Institute of Physics, Faculty of Science, P. J. Safarik University, Park Angelinum 9, 041 54 Kosice, Slovakia;

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  • 正文语种 eng
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