Frustrated honeycomb-lattice bilayer quantum antiferromagnet in a magnetic field

被引：4
作者：
Krokhmalskii, Taras [1 ,2 ]
Baliha, Vasyl [1 ]
Derzhko, Oleg [1 ,2 ,3 ]
Schulenburg, Joerg [4 ]
Richter, Johannes [3 ]
机构：
[1] Natl Acad Sci Ukraine, Inst Condensed Matter Phys, Svientsitskii St 1, UA-79011 Lvov, Ukraine
[2] Ivan Franko Natl Univ Lviv, Dept Theoret Phys, Drahomanov St 12, UA-79005 Lvov, Ukraine
[3] Otto von Guericke Univ, Inst Theoret Phys, POB 4120, D-39016 Magdeburg, Germany
[4] Otto von Guericke Univ, Univ Rechenzentrum, POB 4120, D-39016 Magdeburg, Germany
来源：
PHYSICA B-CONDENSED MATTER | 2018年 / 536卷
关键词：
Quantum Heisenberg antiferromagnet; Frustrated honeycomb-lattice bilayer; Localized magnon; Magnetothermodynamics; SQUARE;
D O I：
10.1016/j.physb.2017.09.064
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Frustrated bilayer quantum magnets have attracted attention as flat-band spin systems with unconventional thermodynamic properties. We study the low-temperature properties of a frustrated honeycomb-lattice bilayer spin-1/2 isotropic (XXX) Heisenberg antiferromagnet in a magnetic field by means of an effective low-energy theory using exact diagonalizations and quantum Monte Carlo simulations. Our main focus is on the magnetization curve and the temperature dependence of the specific heat indicating a finite-temperature phase transition in high magnetic fields.
引用
收藏
页码：388 / 391
页数：4
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