Phase diagram of the three-dimensional axial next-nearest-neighbor Ising model

被引：24

作者：

Gendiar, A

Nishino, T

机构：

[1] Slovak Acad Sci, Inst Elect Engn, SK-84239 Bratislava, Slovakia

[2] Kobe Univ, Fac Sci, Dept Phys, Kobe, Hyogo 6578501, Japan

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.71.024404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The three-dimensional axial next-nearest-neighbor Ising model is studied by a modified tensor product variational approach. A global phase diagram is constructed with numerous commensurate and incommensurate magnetic phases. The devil's stairs behavior for the model is confirmed. The wavelength of the spin modulated phases increases to infinity at the boundary with the ferromagnetic phase. Widths of the commensurate phases are considerably narrower than those calculated by mean-field approximations.

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页数：7

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