Crossed Andreev reflection in topological insulator nanowire T junctions

Jacob Fuchs*, Michael Barth, Cosimo Gorini, Inanç Adagideli, Klaus Richter

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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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.

Original languageEnglish
Article number085415
JournalPhysical Review B
Volume104
Issue number8
DOIs
Publication statusPublished - 12 Aug 2021

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