Publication Date:
2004
abstract:
Highly transmissive ballistic junctions are demonstrated between two superconducting Nb electrodes and the two-dimensional electron gas formed at an InAs/AISb heterojunction. A reproducible fabrication protocol is presented yielding good critical supercurrent values. Current-voltage characteristics were measured down to 0.4 K and the observed supercurrent behavior was analyzed within a ballistic model in the clean limit. This investigation allows us to demonstrate an intrinsic interface transmissivity exceeding 86%.
Iris type:
01.01 Articolo in rivista
Keywords:
Josephson junction; ballistic transport; Nb/InAs/Nb junctions; SUPERCONDUCTING WEAK LINKS; FIELD-EFFECT TRANSISTORS; ENERGY-GAP STRUCTURE; ANDREEV SCATTERING; ELECTRON-GAS; TRANSPORT; HETEROSTRUCTURE; CONSTRICTIONS; TRANSITION; CONTACTS
List of contributors:
Beltram, Fabio; Fazio, Rosario; Giazotto, Francesco
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