FLUCTUATIONS AROUND THE MAGNETIC AND NONMAGNETIC SADDLE-POINTS IN THE 2-DIMENSIONAL SPIN-1/2 FRUSTRATED HEISENBERG-MODEL

被引：0
|
作者：
DISTASIO, M
ERCOLESSI, E
MORANDI, G
TAGLIACOZZO, A
机构：
[1] SYRACUSE UNIV,DEPT PHYS,SYRACUSE,NY 13244
[2] UNIV BOLOGNA,INFM,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY
[3] UNIV NAPLES,INFM,DIPARTIMENTO SCI FIS,I-80125 NAPLES,ITALY
[4] IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY
来源：
PHYSICAL REVIEW B | 1994年 / 49卷 / 16期
关键词：
D O I：
10.1103/PhysRevB.49.10908
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Fermionization of the spin operators is allowed only in the restricted Hilbert space of singly occupied sites. A method to implement this single-site occupancy constraint is applied to the frustrated Heisenberg model. This method allows us to study either magnetic or nonmagnetic phases at finite temperatures. A quantitative estimate of the relative weight of quantum fluctuations around the disordered dimer phases and the antiferromagnetic phase is given.
引用
收藏
页码：10908 / 10913
页数：6
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