Spin superfluidity in the anisotropic XY model in the triangular lattice

被引：13

作者：

Lima, L. S. ^{[1
]}

机构：

[1] Ctr Fed Educ Tecnol & Minas Gerais, Dept Fis & Matemat, BR-30510000 Belo Horizonte, MG, Brazil

来源：

SOLID STATE COMMUNICATIONS | 2016年 / 239卷

关键词：

FERROQUADRUPOLAR HEISENBERG-MODEL; BOSE-EINSTEIN CONDENSATION; LIVED INDUCTION SIGNAL; SQUARE LATTICE; TRANSPORT; ANTIFERROMAGNET; TEMPERATURE; DILUTION; SYSTEMS; HE-3-B;

D O I：

10.1016/j.ssc.2016.04.005

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We use the SU(3) Schwinger's boson theory to study the spin transport properties in the two-dimensional anisotropic frustrated Heisenberg model in the triangular lattice at T=0. We have investigated the behavior of the spin conductivity for this model which presents an single-ion anisotropy. We study the spin transport in the Bose-Einstein condensation regime where we have that the t(z) bosons are condensed and the following condition is valid: < t(z)> = < t(z)(dagger)> = t. Our results show a metallic spin transport for omega > 0 and a superfluid spin transport in the limit of DC conductivity, omega -> 0, where sigma(omega) tends to infinity in this limit of omega. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：5 / 8

页数：4

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