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首页> 外文期刊>Physica, A. Statistical mechanics and its applications >Random-field-driven phase transitions in the ground state of the S=1 XXZ spin chain
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Random-field-driven phase transitions in the ground state of the S=1 XXZ spin chain

机译：S = 1 XXZ自旋链的基态中的随机场驱动相变

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The ground state of the S=1 XXZ spin chain under the influence of the random magnetic field is studied by means of the exact diagonalization method. The S = 1/2 counterpart has been investigated extensively so far. The easy-plane area, including the Haldane and the XY phases, is considered. The area suffers significantly From the magnitude of the constituent spin. Destruction of the Haldane state is observed at a critical strength of the random field, which is comparable to the magnitude of the Haldane gap. This transition is characterized by the disappearance of the string order. The XY region continues until at a critical randomness, at which a transition of the KT-universality class occurs. These features are contrasted with those of the S = 1/2 counterpart. (C) 1998 Elsevier Science B.V. All rights reserved. [References: 32]
机译：利用精确的对角化方法研究了S = 1 XXZ自旋链在随机磁场作用下的基态。到目前为止，已对S = 1/2的对应物进行了广泛的研究。考虑了包括Haldane和XY相在内的易平面区域。该区域受组成自旋幅度的影响很大。在随机场的临界强度处观察到Haldane状态的破坏，该强度与Haldane间隙的大小相当。此过渡的特征在于字符串顺序的消失。 XY区域一直持续到临界随机性为止，在该临界随机性下会发生KT大学类的转变。这些特征与S = 1/2的特征相反。 （C）1998 Elsevier Science B.V.保留所有权利。 [参考：32]

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