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Title: Thermoelectric-induced unitary Cooper pair splitting efficiency

Thermoelectric effect is exploited to optimize the Cooper pair splitting efficiency in a Y-shaped junction, which consists of two normal leads coupled to an s-wave superconductor via double noninteracting quantum dots. Here, utilizing temperature difference rather than bias voltage between the two normal leads, and tuning the two dot levels such that the transmittance of elastic cotunneling process is particle-hole symmetric, we find current flowing through the normal leads are totally contributed from the splitting of Cooper pairs emitted from the superconductor. Such a unitary splitting efficiency is significantly better than the efficiencies obtained in experiments so far.
Authors:
;  [1] ;  [2] ;  [1] ;  [3]
  1. Center for Interdisciplinary Studies and Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000 (China)
  2. Department of Physics, Southern University of Science and Technology of China, Shenzhen 518005 (China)
  3. (China)
Publication Date:
OSTI Identifier:
22486128
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 21; Other Information: (c) 2015 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; COOPER PAIRS; EFFICIENCY; ELECTRIC POTENTIAL; EMISSION; HOLES; QUANTUM DOTS; S WAVES; SUPERCONDUCTING JUNCTIONS; SUPERCONDUCTORS; SYMMETRY; TUNING