Giant Magnetoconductance Oscillations in Hybrid Superconductor-Semiconductor Core/Shell Nanowire Devices

被引：18

作者：

Guel, Oe ^{[1
,2
]}

Guenel, H. Y. ^{[1
,2
,3
]}

Lueth, H. ^{[1
,2
]}

Rieger, T. ^{[1
,2
]}

Wenz, T. ^{[1
,2
]}

Haas, F. ^{[1
,2
]}

Lepsa, M. ^{[1
,2
]}

Panaitov, G. ^{[2
,4
]}

Gruetzmacher, D. ^{[1
,2
]}

Schaepers, Th. ^{[1
,2
]}

机构：

[1] Forschungszentrum Julich, Peter Grunberg Inst PGI 9, D-52425 Julich, Germany

[2] Forschungszentrum Julich, JARA Fundamentals Future Informat Technol, D-52425 Julich, Germany

[3] Rhein Westfal TH Aachen, Inst Semicond Elect, D-52074 Aachen, Germany

[4] Forschungszentrum Julich, Peter Grunberg Inst PGI 8, D-52425 Julich, Germany

来源：

NANO LETTERS | 2014年 / 14卷 / 11期

关键词：

GaAS/InAs core/shell nanowires; magnetoconductance oscillations; Josephson effect; superconducting electrodes; Andreev reflection; reflectionless tunneling; CORE-SHELL NANOWIRES; ANDREEV REFLECTION; PHASE; INTERFACES; GROWTH;

D O I：

10.1021/nl502598s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The magnetotransport of GaAs/InAs core/shell nanowires contacted by two superconducting Nb electrodes is investigated, where the InAs shell forms a tube-like conductive channel around the highly resistive GaAs core. By applying a magnetic field along the nanowire axis, regular magnetoconductance oscillations with an amplitude in the order of e(2)/h are observed. The oscillation amplitude is found to be larger by 2 orders of magnitude compared to the measurements of a reference sample with normal metal contacts. For the Nb-contacted core/shell nanowire the oscillation period corresponds to half a flux quantum Phi(0)/2 = h/2e in contrast to the period of Phi(0) of the reference sample. The strongly enhanced magnetoconductance oscillations are explained by phase-coherent resonant Andreev reflections at the Nb-core/shell nanowire interface.

引用

页码：6269 / 6274

页数：6

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