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Pseudospin magnetism in graphene

被引：208
|
作者：
Min, Hongki [1 ]
Borghi, Giovanni [2 ,3 ]
Polini, Marco [2 ,3 ]
MacDonald, A. H. [1 ]
机构：
[1] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA
[2] INFM, CNR, NEST, I-56126 Pisa, Italy
[3] Scuola Normale Super Pisa, I-56126 Pisa, Italy
来源：
PHYSICAL REVIEW B | 2008年 / 77卷 / 04期
关键词：
D O I：
10.1103/PhysRevB.77.041407
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We predict that neutral graphene bilayers are pseudospin magnets in which the charge density contribution from each valley and spin spontaneously shifts to one of the two layers. The band structure of this system is characterized by a momentum-space vortex, which is responsible for unusual competition between band and kinetic energies, leading to symmetry breaking in the vortex core. We discuss the possibility of realizing a pseudospin version of ferromagnetic metal spintronics in graphene bilayers based on hysteresis associated with this broken symmetry.
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页数：4
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