DISTORTED DIAMOND ISING-HUBBARD CHAIN IN THE SPECIAL LIMIT OF INFINITE ON-SITE REPULSION

被引：0
|
作者：
Lisnyi, B. M. [1 ]
机构：
[1] Nat Acad Sci Ukraine, Inst Condensed Matter Phys, 1 Svientsitskii Str, UA-79011 Lvov, Ukraine
来源：
UKRAINIAN JOURNAL OF PHYSICS | 2024年 / 69卷 / 10期
关键词：
Ising-Hubbard diamond chain; exact solution; ground state; thermodynamic characteristics; geometric frustration; MAGNETIC-PROPERTIES; HEISENBERG MODEL; QUASI-PHASES; PLATEAU;
D O I：
10.15407/ujpe69.10.732
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The exact solution of the distorted diamond Ising-Hubbard chain is analyzed in the special limit of infinite on-site electron-electron repulsion, where the two-electron Hubbard dimer becomes equivalent to the antiferromagnetic isotropic Heisenberg dimer. The special limit of infinite repulsion for the matrix of the cell Hamiltonian of this model is analytically calculated, and it is demonstrated that the exact solution of the distorted diamond Ising-Hubbard chain in this limit coincides with the exact solution of the spin-1/2distorted diamond Ising-Heisenberg chain with antiferromagnetic isotropic Heisenberg interaction. The numerical calculation of the special limit of infinite repulsion for the ground-state phase diagram and thermodynamic characteristics of the distorted diamond Ising-Hubbard chain was performed in a way that provides a very fast convergence to the limit results for these characteristics.
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页数：10
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