Crossed Andreev reflection in topological insulator nanowire T junctions

Fuchs, Jacob and Barth, Michael and Gorini, Cosimo and Adagideli, İnanç and Richter, Klaus (2021) Crossed Andreev reflection in topological insulator nanowire T junctions. Physical Review B, 104 (8). ISSN 2469-9950 (Print) 2469-9969 (Online)

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Abstract

We numerically study crossed Andreev reflection (CAR) in a topological insulator nanowire T junction where one lead is proximitized by a superconductor. We perform realistic simulations based on the three-dimensional (3D) Bernevig-Hughes-Zhang model and compare the results with those from an effective two-dimensional (2D) surface model, whose computational cost is much lower. Both approaches show that CAR should be clearly observable in a wide parameter range, including perfect CAR in a somewhat more restricted range. Furthermore, it can be controlled by a magnetic field and is robust to disorder. Our effective 2D implementation allows us to model systems of micron size, typical of experimental setups but computationally too heavy for 3D models.
Item Type: Article
Divisions: Faculty of Engineering and Natural Sciences > Basic Sciences > Physics
Faculty of Engineering and Natural Sciences
Depositing User: İnanç Adagideli
Date Deposited: 26 Aug 2021 22:30
Last Modified: 26 Aug 2021 22:30
URI: https://research.sabanciuniv.edu/id/eprint/42373

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