Induced spin texture in semiconductor/topological insulator heterostructures

Details Induced spin texture in semiconductor/topological insulator heterostructures Induced spin texture in semiconductor/topological insulator heterostructures

2011-03-08

arxiv.org/abs/1103.1580v2

Phys. Rev. B 84, 085103 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 2 figures, published version

Scientific paper

10.1103/PhysRevB.84.085103

We show that a semiconductor thin film can acquire a non-trivial spin texture due to the proximity effect induced by a topological insulator. The effect stems from coupling to the topological surface states and is present even when the insulator is doped. We propose a semiconductor/topological insulator heterostructure as a device that allows measuring interface properties and probing surface states in uncompensated samples. We also find that the topological insulator surface modes can be significantly broadened and shifted by the presence of metallic contacts.

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