Anisotropic magnetoresistance in topological insulator Bi1.5Sb0.5Te1.8Se1.2/CoFe heterostructures | Zendy

Bin Xia | Zendy; Peng Ren | Zendy; Azat Sulaev | Zendy; Zhengyi Li | Zendy; P. Liu | Zendy; Zhili Dong | Zendy; Lan Wang | Zendy

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Anisotropic magnetoresistance in topological insulator Bi1.5Sb0.5Te1.8Se1.2/CoFe heterostructures

Author(s) -

Bin Xia,

Peng Ren,

Azat Sulaev,

Zhengyi Li,

P. Liu,

Zhili Dong,

Lan Wang

Publication year - 2012

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4769894

Subject(s) - magnetoresistance , topological insulator , condensed matter physics , heterojunction , anisotropy , materials science , giant magnetoresistance , physics , magnetic field , quantum mechanics

Topological insulator is composed of an insulating bulk state and time reversal symmetry protected two-dimensional surface states. One of the characteristics of the surface states is the locking between electron momentum and spin orientation. Here, we report a novel in-plane anisotropic magnetoresistance in topological insulator Bi1.5Sb0.5Te1.8Se1.2/CoFe heterostructures. To explain the novel effect, we propose that the Bi1.5Sb0.5Te1.8Se1.2/CoFe heterostructure forms a spin-valve or Giant magnetoresistance device due to spin-momentum locking. The novel in-plane anisotropic magnetoresistance can be explained as a Giant magnetoresistance effect of the Bi1.5Sb0.5Te1.8Se1.2/CoFe heterostructures

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