Magnetic domains and stripes in a spin-Fermion model for cuprates

被引:44
作者
Buhler, C [1 ]
Yunoki, S
Moreo, A
机构
[1] Florida State Univ, Dept Phys, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA
[2] Florida State Univ, MARTECH, Tallahassee, FL 32306 USA
关键词
D O I
10.1103/PhysRevLett.84.2690
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Monte Carlo simulations applied to a model of interacting fermions and classical spins show the existence of antiferromagnetic spin domains and charge stripes upon hole doping. The stripes have a filling of approximately 1/2 hole per site, and they separate spin domains with a pi phase shift among them. The observed stripes run either along the x or y axes. No particular boundary conditions or external fields are needed to stabilize these structures. When magnetic incommensurate peaks are observed at momentum pi(1, 1 - delta), charge incommensurate peaks appear at (0, 2 delta). The charge fluctuations responible for the stripe formation also induce a pseudogap in the density of states.
引用
收藏
页码:2690 / 2693
页数:4
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