Selective-Area-Grown Semiconductor-Superconductor Hybrids: A Basis for Topological Networks

被引：101

作者：

Vaitiekenas, S. ^{[1
,2
]}

Whiticar, A. M. ^{[1
,2
]}

Deng, M. -T. ^{[1
,2
]}

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

Sestoft, J. E. ^{[1
,2
]}

Palmstrom, C. J. ^{[3
]}

Marti-Sanchez, S. ^{[4
,5
]}

Arbiol, J. ^{[4
,5
,6
]}

Krogstrup, P. ^{[1
,2
]}

Casparis, L. ^{[1
,2
]}

Marcus, C. M. ^{[1
,2
]}

机构：

[1] Niels Bohr Inst, Univ Copenhagen, Ctr Quantum Devices, Univ Pk 5, DK-2100 Copenhagen, Denmark

[2] Univ Copenhagen, Niels Bohr Inst, Stn Copenhagen Q, Univ Pk 5, DK-2100 Copenhagen, Denmark

[3] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

[4] CSIC, Catalan Inst Nanosci & Nanotechnol ICN2, Campus UAB, Barcelona 08193, Spain

[5] BIST, Campus UAB, Barcelona 08193, Spain

[6] ICREA, Pg Lluis Co 23, Barcelona 08010, Catalonia, Spain

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 121卷 / 14期

基金：

新加坡国家研究基金会;

关键词：

SPIN-ORBIT INTERACTION; QUANTUM COMPUTATION; MAJORANA FERMIONS; NANOWIRE DEVICES; PARITY; CONDUCTANCE; EPITAXY; REGIMES; ANYONS; STATES;

D O I：

10.1103/PhysRevLett.121.147701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We introduce selective area grown hybrid InAs/Al nanowires based on molecular beam epitaxy, allowing arbitrary semiconductor-superconductor networks containing loops and branches. Transport reveals a hard induced gap and unpoisoned 2e-periodic Coulomb blockade, with temperature dependent 1e features in agreement with theory. Coulomb peak spacing in parallel magnetic field displays overshoot, indicating an oscillating discrete near-zero subgap state consistent with device length. Finally, we investigate a loop network, finding strong spin-orbit coupling and a coherence length of several microns. These results demonstrate the potential of this platform for scalable topological networks among other applications.

引用

页数：5

共 45 条

[1] Milestones Toward Majorana-Based Quantum Computing [J].