Josephson coupling through one-dimensional ballistic channel in semiconductor-superconductor hybrid quantum point contacts

Hiroshi Irie, Yuichi Harada, Hiroki Sugiyama, Tatsushi Akazaki

研究成果: ジャーナルへの寄稿記事

8 引用 (Scopus)

抄録

We study a superconducting quantum point contact made of a narrow In0.75Ga0.25As channel with Nb proximity electrodes. The narrow channel is formed in a gate-fitted constriction of InGaAs/InAlAs/InP heterostructure hosting a two-dimensional electron gas. When the channel opening is varied with the gate, the Josephson critical current exhibits a discretized variation that arises from the quantization of the transverse momentum in the channel. The quantization of Josephson critical current persists down to the single-channel regime, providing an unambiguous demonstration of a semiconductor-superconductor hybrid Josephson junction involving only a single ballistic channel.

元の言語英語
記事番号165415
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
89
発行部数16
DOI
出版物ステータス出版済み - 4 21 2014

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Critical currents
Point contacts
Ballistics
ballistics
Superconducting materials
Semiconductor materials
Two dimensional electron gas
Heterojunctions
Momentum
Demonstrations
Electrodes
critical current
transverse momentum
Josephson junctions
electron gas
proximity
constrictions
electrodes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

これを引用

Josephson coupling through one-dimensional ballistic channel in semiconductor-superconductor hybrid quantum point contacts. / Irie, Hiroshi; Harada, Yuichi; Sugiyama, Hiroki; Akazaki, Tatsushi.

:: Physical Review B - Condensed Matter and Materials Physics, 巻 89, 番号 16, 165415, 21.04.2014.

研究成果: ジャーナルへの寄稿記事

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