Gate-tunable high mobility remote-doped InSb/In_{1-x}Al_{x}Sb quantum well heterostructures

Abstract

Gate-tunable high-mobility InSb/In_{1-x}Al_{x}Sb quantum wells (QWs) grown on GaAs substrates are reported. The QW two-dimensional electron gas (2DEG) channel mobility in excess of 200,000 cm^{2}/Vs is measured at T=1.8K. In asymmetrically remote-doped samples with an HfO_{2} gate dielectric formed by atomic layer deposition, parallel conduction is eliminated and complete 2DEG channel depletion is reached with minimal hysteresis in gate bias response of the 2DEG electron density. The integer quantum Hall effect with Landau level filling factor down to 1 is observed. A high-transparency non-alloyed Ohmic contact to the 2DEG with contact resistance below 1Ω \cdot mm is achieved at 1.8K.

25 pages, 10 figures

References in corpus (5)

• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Observation of Majorana Fermions in a Nb-InSb Nanowire-Nb Hybrid Quantum Device
• Gate-tunable high mobility remote-doped InSb/In_{1-x}Al_{x}Sb quantum well heterostructures
• A Surface-Gated InSb Quantum Well Single Electron Transistor
• Characterization of InSb quantum wells with atomic layer deposited gate dielectrics

Cited by in corpus (12)

• Quantized conductance and large g-factor anisotropy in InSb quantum point contacts
• Gate-tunable high mobility remote-doped InSb/In_{1-x}Al_{x}Sb quantum well heterostructures
• Quantum transport in high-quality shallow InSb quantum wells
• Progress in superconductor-semiconductor topological Josephson junctions
• Gate-defined Quantum Point Contact in an InSb Two-dimensional Electron Gas
• Selective-Area-Grown PbTe-Pb Planar Josephson Junctions for Quantum Devices
• Toward durable Al-InSb hybrid heterostructures via epitaxy of 2ML interfacial InAs screening layers
• Gate-defined Two-dimensional Hole and Electron Systems in an Undoped InSb Quantum Well
• Measurements of spin-orbit interaction in epitaxially grown InAs nanosheets
• Field effect two-dimensional electron gases in modulation-doped InSb surface quantum wells
• High transparency induced superconductivity in field effect two-dimensional electron gases in undoped InAs/AlGaSb surface quantum wells
• Spin splitting, Kondo correlation and singlet-doublet quantum phase transition in a superconductor-coupled InSb nanosheet quantum dot