Exactly solvable Ising-Heisenberg chain with triangular XXZ-Heisenberg plaquettes

被引：56

作者：

Antonosyan, Diana ^{[1
,2
]}

Bellucci, Stefano ^{[3
]}

Ohanyan, Vadim ^{[1
,4
]}

机构：

[1] Yerevan State Univ, Dept Theoret Phys, Yerevan 0025, Armenia

[2] Natl Acad Sci Armenia, Inst Phys Res, Ashtarak 0203, Armenia

[3] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[4] Yerevan Phys Inst, Yerevan 0036, Armenia

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 01期

关键词：

Heisenberg model; Ising model; magnetic transitions; phase diagrams; HELIX-COIL TRANSITION; NEAREST-NEIGHBOR INTERACTION; MAGNETIZATION PLATEAUS; QUANTUM; EXCITATIONS; ANTIFERROMAGNET; POLYPEPTIDES; LATTICE; ORDER; MODEL;

D O I：

10.1103/PhysRevB.79.014432

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A mixed Ising-Heisenberg spin system consisting of triangular XXZ-Heisenberg spin clusters assembled into a chain by alternating with Ising spins interacting to all three spins in the triangle is considered. The exact solution of the model is given in terms of the generalized decoration-iteration map and within the transfer-matrix technique. Exact expressions for thermodynamic functions are derived. Ground-state phase diagrams and thermodynamic and magnetic properties of the system are examined.

引用

页数：11

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