Half-metallic magnetization plateaux

被引：4

作者：

Hao, Zhihao ^{[1
]}

Starykh, Oleg A. ^{[2
]}

机构：

[1] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada

[2] Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 16期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

INSULATOR-TRANSITION; TRIANGULAR LATTICE; ANTIFERROMAGNET;

D O I：

10.1103/PhysRevB.87.161109

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We propose novel interaction-based routes to half-metal states for interacting electrons on two-dimensional lattices. Magnetic field applied parallel to the lattice is used to tune one of the spin densities to a particular value commensurate with the lattice in which the system spontaneously "locks in" via the Van Hove enhanced density wave state. Electrons of opposite spin polarization retain their metallic character and provide for the half-metal state which, in addition, supports the magnetization plateau in a finite interval of external magnetic field. A similar half-metal state is realized in the finite-U Hubbard model on a triangular lattice at 1/3 of the maximum magnetization. DOI: 10.1103/PhysRevB.87.161109

引用

页数：5

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