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Title: A ballistic two-dimensional-electron-gas Andreev interferometer

Abstract

We report the realization and investigation of a ballistic Andreev interferometer based on an InAs two dimensional electron gas coupled to a superconducting Nb loop. We observe strong magnetic modulations in the voltage drop across the device due to quasiparticle interference within the weak-link. The interferometer exhibits flux noise down to ∼80 μΦ{sub 0}/√(Hz) and a robust behavior in temperature with voltage oscillations surviving up to ∼7 K. Besides this remarkable performance, the device represents a crucial first step for the realization of a fully-tunable ballistic superconducting magnetometer and embodies a potential advanced platform for the investigation of Majorana bound states, non-local entanglement of Cooper pairs, as well as the manipulation and control of spin triplet correlations.

Authors:
; ;  [1]
  1. CNR-IOM, Laboratorio TASC, Area Science Park, I-34149 Trieste (Italy)
Publication Date:
OSTI Identifier:
22299908
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 104; Journal Issue: 24; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BOUND STATE; COOPER PAIRS; CORRELATIONS; ELECTRIC POTENTIAL; ELECTRON GAS; EQUIPMENT; INDIUM ARSENIDES; INTERFERENCE; INTERFEROMETERS; MODULATION; OSCILLATIONS; QUANTUM ENTANGLEMENT; SPIN; TEMPERATURE RANGE 0000-0013 K; TRIPLETS; VOLTAGE DROP

Citation Formats

Amado, M., E-mail: mario.amadomontero@sns.it, Fornieri, A., Sorba, L., Giazotto, F., E-mail: f.giazotto@sns.it, and Biasiol, G. A ballistic two-dimensional-electron-gas Andreev interferometer. United States: N. p., 2014. Web. doi:10.1063/1.4884952.
Amado, M., E-mail: mario.amadomontero@sns.it, Fornieri, A., Sorba, L., Giazotto, F., E-mail: f.giazotto@sns.it, & Biasiol, G. A ballistic two-dimensional-electron-gas Andreev interferometer. United States. https://doi.org/10.1063/1.4884952
Amado, M., E-mail: mario.amadomontero@sns.it, Fornieri, A., Sorba, L., Giazotto, F., E-mail: f.giazotto@sns.it, and Biasiol, G. 2014. "A ballistic two-dimensional-electron-gas Andreev interferometer". United States. https://doi.org/10.1063/1.4884952.
@article{osti_22299908,
title = {A ballistic two-dimensional-electron-gas Andreev interferometer},
author = {Amado, M., E-mail: mario.amadomontero@sns.it and Fornieri, A. and Sorba, L. and Giazotto, F., E-mail: f.giazotto@sns.it and Biasiol, G.},
abstractNote = {We report the realization and investigation of a ballistic Andreev interferometer based on an InAs two dimensional electron gas coupled to a superconducting Nb loop. We observe strong magnetic modulations in the voltage drop across the device due to quasiparticle interference within the weak-link. The interferometer exhibits flux noise down to ∼80 μΦ{sub 0}/√(Hz) and a robust behavior in temperature with voltage oscillations surviving up to ∼7 K. Besides this remarkable performance, the device represents a crucial first step for the realization of a fully-tunable ballistic superconducting magnetometer and embodies a potential advanced platform for the investigation of Majorana bound states, non-local entanglement of Cooper pairs, as well as the manipulation and control of spin triplet correlations.},
doi = {10.1063/1.4884952},
url = {https://www.osti.gov/biblio/22299908}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 24,
volume = 104,
place = {United States},
year = {Mon Jun 16 00:00:00 EDT 2014},
month = {Mon Jun 16 00:00:00 EDT 2014}
}