Ground-state phase diagram of S=1 XXZ chains with uniaxial single-ion-type anisotropy

Article

关键词: QUANTUM SPIN CHAINS;    CONFORMAL-INVARIANCE;    BOND ALTERNATION;    TRANSITIONS;    MODEL;   

DOI  :  10.1103/PhysRevB.67.104401

来源: SCIE

【 摘 要 】

One-dimensional S = 1 XXZ chains with uniaxial single-ion-type anisotropy are studied by numerical exact diagonalization of finite-size systems. The numerical data are analyzed using conformal field theory, the level spectroscopy, phenomenological renormalization-group, and finite-size scaling method. We thus present a quantitatively reliable ground-state phase diagram of this model. The ground states of this model contain the Haldane phase, large-D phase, Neel phase, two XY phases, and the ferromagnetic phase. There are four different types of transitions between these phases: the Brezinskii-Kosterlitz-Thouless-type transitions, the Gaussian-type transitions, the Ising-type transitions, and the first-order transitions. The locations of these critical lines are accurately determined.

【 授权许可】

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