skip to main content

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

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] ;  [2]
  1. NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, I-56127 Pisa (Italy)
  2. CNR-IOM, Laboratorio TASC, Area Science Park, I-34149 Trieste (Italy)
Publication Date:
OSTI Identifier:
22299908
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 24; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
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