Instability of a ferrimagnetic state of a frustrated S=1/2 Heisenberg antiferromagnet in two dimensions

被引：11
作者：
Nakano, Hiroki [1 ]
Sakai, Toru [1 ,2 ]
机构：
[1] Univ Hyogo, Grad Sch Mat Sci, Kamigori, Hyogo 6781297, Japan
[2] Japan Atom Energy Agcy, SPring 8, Sayo, Hyogo 6795148, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2015年 / 54卷 / 03期
关键词：
T-J; MAGNETIZATION PROCESS; KAGOME LATTICE; SPIN CHAINS; QUANTUM; MODELS; EXCITATIONS; HUBBARD; SQUARE;
D O I：
10.7567/JJAP.54.030305
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
To clarify the instability of the ferrimagnetism which is the fundamental magnetism of ferrite, numerical-diagonalization study is carried out for the two-dimensional S = 1/2 Heisenberg antiferromagnet with frustration. We find that the ferrimagnetic ground state has the spontaneous magnetization in small frustration; due to a frustrating interaction above a specific strength, the spontaneous magnetization discontinuously vanishes so that the ferrimagnetic state appears only under some magnetic fields. We also find that, when the interaction is increased further, the ferrimagnetism disappears even under magnetic field. (C) 2015 The Japan Society of Applied Physics
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页数：4
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