Quantized Conductance and Its Correlation to the Supercurrent in a Nanowire Connected to Superconductors

被引：32

作者：

Abay, Simon ^{[1
]}

Persson, Daniel ^{[1
]}

Nilsson, Henrik ^{[2
]}

Xu, H. Q. ^{[2
,3
,4
]}

Fogelstrom, Mikael ^{[1
]}

Shumeiko, Vitaly ^{[1
]}

Delsing, Per ^{[1
]}

机构：

[1] Chalmers Univ Technol, Dept Microtechnol & Nanosci MC2, SE-41296 Gothenburg, Sweden

[2] Lund Univ, Div Solid State Phys, S-22100 Lund, Sweden

[3] Peking Univ, Key Lab Phys & Chem Nanodevices, Beijing 100871, Peoples R China

[4] Peking Univ, Dept Elect, Beijing 100871, Peoples R China

来源：

NANO LETTERS | 2013年 / 13卷 / 08期

基金：

瑞典研究理事会;

关键词：

InAs nanowires; supercurrent; Andreev reflection; quantum of conductance;

D O I：

10.1021/nl4014265

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report conductance and supercurrent of InAs nano wires coupled to Al-superconducting electrodes with short channel lengths and good Ohmic contacts. The nanowires are suspended 15 nm above a local gate electrode. The charge density in the nanowires can be controlled by a small change in the gate voltage. For large negative gate voltages, the number of conducting channels is reduced gradually, and we observe a stepwise decrease of both conductance and critical current before the conductance vanishes completely.

引用

页码：3614 / 3617

页数：4

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