Focused crossed Andreev reflection

H. Haugen; A. Brataas; X. Waintal; G. E.W. Bauer

doi:10.1209/0295-5075/93/67005

Focused crossed Andreev reflection

H. Haugen, A. Brataas, X. Waintal, G. E.W. Bauer

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

We consider non-local transport mediated by Andreev reflection in a two-dimensional electron gas (2DEG) connected to one superconducting and two normal metal terminals. A robust scheme is presented for observing crossed Andreev reflection (CAR) between the normal metal terminals based on electron focusing by weak perpendicular magnetic fields. At slightly elevated temperatures the CAR signature can be easily distinguished from a background of quantum interference fluctuations. The CAR-induced entanglement between electrons can be switched on and off over large distances by the magnetic field.

Original language	English
Article number	67005
Journal	Europhysics Letters
Volume	93
Issue number	6
DOIs	https://doi.org/10.1209/0295-5075/93/67005
Publication status	Published - 2011 Mar

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AB - We consider non-local transport mediated by Andreev reflection in a two-dimensional electron gas (2DEG) connected to one superconducting and two normal metal terminals. A robust scheme is presented for observing crossed Andreev reflection (CAR) between the normal metal terminals based on electron focusing by weak perpendicular magnetic fields. At slightly elevated temperatures the CAR signature can be easily distinguished from a background of quantum interference fluctuations. The CAR-induced entanglement between electrons can be switched on and off over large distances by the magnetic field.

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Focused crossed Andreev reflection

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