Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Diffusive and ballistic transport in thin InSb nanowire devices using a few-layer-graphene-AlO x gate

Journal Article · · Materials for Quantum Technology
Abstract

Quantum devices based on InSb nanowires (NWs) are a prime candidate system for realizing and exploring topologically-protected quantum states and for electrically-controlled spin-based qubits. The influence of disorder on achieving reliable quantum transport regimes has been studied theoretically, highlighting the importance of optimizing both growth and nanofabrication. In this work, we consider both aspects. We developed InSb NW with thin diameters, as well as a novel gating approach, involving few-layer graphene and atomic layer deposition-grown AlO x . Low-temperature electronic transport measurements of these devices reveal conductance plateaus and Fabry–Pérot interference, evidencing phase-coherent transport in the regime of few quantum modes. The approaches developed in this work could help mitigate the role of material and fabrication-induced disorder in semiconductor-based quantum devices.

Research Organization:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
SC0019274
OSTI ID:
2320319
Alternate ID(s):
OSTI ID: 2315064
OSTI ID: 2339875
Journal Information:
Materials for Quantum Technology, Journal Name: Materials for Quantum Technology Journal Issue: 1 Vol. 4; ISSN 2633-4356
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United Kingdom
Language:
English

References (28)

Atomic Layer Deposition for Graphene Device Integration journal May 2017
Surface chemistry of graphene and graphene oxide: A versatile route for their dispersion and tribological applications journal September 2020
Graphene–dielectric integration for graphene transistors journal November 2010
Conductance Quantization at Zero Magnetic Field in InSb Nanowires journal May 2016
High Mobility Stemless InSb Nanowires journal April 2019
Spin Transport in Ferromagnet-InSb Nanowire Quantum Devices journal April 2020
Hydrophobic Surface Treatment and Interrupted Atomic Layer Deposition for Highly Resistive Al 2 O 3 Films on Graphene journal October 2016
Multimode Fabry-Pérot Conductance Oscillations in Suspended Stacking-Faults-Free InAs Nanowires journal September 2010
Quantized Conductance in an InSb Nanowire journal December 2012
Two-dimensional gas of massless Dirac fermions in graphene journal November 2005
Spin–orbit qubit in a semiconductor nanowire journal December 2010
Exponential protection of zero modes in Majorana islands journal March 2016
Electrical control of single hole spins in nanowire quantum dots journal February 2013
Conductance through a helical state in an Indium antimonide nanowire journal September 2017
Vapor-liquid-solid mechanism of single crystal growth journal March 1964
Towards high mobility InSb nanowire devices journal May 2015
Kwant: a software package for quantum transport journal June 2014
Encapsulation of graphene transistors and vertical device integration by interface engineering with atomic layer deposited oxide journal November 2016
Charge-Impurity Effects in Hybrid Majorana Nanowires journal November 2021
Disentangling the effects of spin-orbit and hyperfine interactions on spin blockade journal May 2010
Conductance behavior in nanowires with spin-orbit interaction: A numerical study journal December 2014
Spin-orbit interaction in InSb nanowires journal May 2015
Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures journal August 2010
Helical Liquids and Majorana Bound States in Quantum Wires journal October 2010
Fast Spin-Orbit Qubit in an Indium Antimonide Nanowire journal February 2013
Interplay between Classical Magnetic Moments and Superconductivity in Quantum One-Dimensional Conductors: Toward a Self-Sustained Topological Majorana Phase journal October 2013
Estimating disorder and its adverse effects in semiconductor Majorana nanowires journal December 2021
Signatures of Majorana Fermions in Hybrid Superconductor-Semiconductor Nanowire Devices journal April 2012