Giga-Hertz quantized charge pumping in bottom gate defined InAs nanowire quantum dots

Abstract

Semiconducting nanowires (NWs) are a versatile, highly tunable material platform at the heart of many new developments in nanoscale and quantum physics. Here, we demonstrate charge pumping, i.e., the controlled transport of individual electrons through an InAs NW quantum dot (QD) device at frequencies up to $1.3$GHz. The QD is induced electrostatically in the NW by a series of local bottom gates in a state of the art device geometry. A periodic modulation of a single gate is enough to obtain a dc current proportional to the frequency of the modulation. The dc bias, the modulation amplitude and the gate voltages on the local gates can be used to control the number of charges conveyed per cycle. Charge pumping in InAs NWs is relevant not only in metrology as a current standard, but also opens up the opportunity to investigate a variety of exotic states of matter, e.g. Majorana modes, by single electron spectroscopy and correlation experiments.

21 pages

References in corpus (8)

• Evidence of Majorana fermions in an Al - InAs nanowire topological superconductor
• Circuit Quantum Electrodynamics with a Spin Qubit
• Single-parameter non-adiabatic quantized charge pumping
• Partitioning of on-demand electron pairs
• Local electrical tuning of the nonlocal signals in a Cooper pair splitter
• Quantized Charge Pumping through a Carbon Nanotube Double Quantum Dot
• Quantum charge pumping through fractional Fermions in charge density modulated quantum wires and Rashba nanowires
• Quantum Pump for Fractional Charge

Cited by in corpus (12)

• Half-levitons -- zero-energy excitations of a driven Fermi sea
• Simulation of 1D topological phases in driven quantum dot arrays
• Weak (anti)localization in tubular semiconductor nanowires with spin-orbit coupling
• Time-energy filtering of single electrons in ballistic waveguides
• Wet etch methods for InAs nanowire patterning and self-aligned electrical contacts
• High-temperature fusion of a multi-electron leviton
• Magnetoconductance correction in zinc-blende semiconductor nanowires with spin-orbit coupling
• Non-adiabatic single-electron pump in a dopant-free GaAs/AlGaAs 2DEG
• Single-electron $G^{(2)}$ function at nonzero temperatures
• Single-electron emission from degenerate quantum levels
• Single charge transport in a fully superconducting SQUISET locally tuned by self-inductance effects
• Revealing the internal spin dynamics in a double quantum dot by periodic voltage modulation