Study of ground state phases for spin-1/2 Falicov-Kimball model on a triangular lattice

被引：9

作者：

Kumar, Sant ^{[1
]}

Yadav, Umesh K. ^{[2
]}

Maitra, T. ^{[1
]}

Singh, Ishwar ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Phys, Roorkee 247667, Uttar Pradesh, India

[2] Indian Inst Sci, Ctr Condensed Matter Theory, Dept Phys, Bangalore 560012, Karnataka, India

来源：

SOLID STATE COMMUNICATIONS | 2014年 / 189卷

关键词：

A. Strongly correlated electron systems; C. Triangular lattice; D. Magnetic phase transitions; D. Exchange interactions; MAGNETIC-PROPERTIES; THERMODYNAMICS; TRANSITIONS; SPINLESS; CHARGE; HOLES; SPINS;

D O I：

10.1016/j.ssc.2014.03.014

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The spin dependent Falicov-Kimball model (FKM) is studied on a triangular lattice using numerical diagonalization technique and Monte-Carlo simulation algorithm. Magnetic properties have been explored for different values of parameters: on-site Coulomb correlation U, exchange interaction J and filling of electrons. We have found that the ground state configurations exhibit long range Neel order, ferromagnetism or a mixture of both as J is varied. The magnetic moments of itinerant (d) and localized U) electrons are also studied. For the one-fourth filling case we found no magnetic moment from d- and f-electrons for U less than a critical value. '.2014 Elsevier Ltd. All rights reserved.

引用

页码：21 / 27

页数：7

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