Improving reproducibility of quantum devices with completely undoped architectures
arXiv:2011.04119 · doi:10.1063/5.0024923
Abstract
The reproducible operation of quantum electronic devices is a key requirement for future quantum information processing and spintronics applications. Traditionally quantum devices have been fabricated from modulation doped heterostructures, where there is an intrinsic lack of reproducibility due to the random potential from ionized donors. Here we show that we can greatly improve reproducibility over modulation doped devices by using a completely undoped architecture, with superior uniformity in the confinement potential and more consistent operating voltages for both electron and hole devices. Our results demonstrate that undoped heterostructures have significant advantages over modulation doping for reproducible manufacturing of quantum devices.
References in corpus (17)
- Quantum Computation with Quantum Dots
- Possible Spin Polarization in a One-Dimensional Electron Gas
- A CMOS silicon spin qubit
- Electric Dipole Spin Resonance for Heavy Holes in Quantum Dots
- All-Electric Quantum Point Contact Spin Valve
- Electrical control over single hole spins in nanowire quantum dots
- Phenomenological model for the 0.7 conductance feature in quantum wires
- Hole Spin Coherence in a Ge/Si Heterostructure Nanowire
- In situ reduction of charge noise in GaAs/AlGaAs Schottky-gated devices
- Odd and even Kondo effects from emergent localisation in quantum point contacts
- Cryogenic on-chip multiplexer for the study of quantum transport in 256 split-gate devices
- Fabrication and characterisation of ambipolar devices on an undoped AlGaAs/GaAs heterostructure
- All-electrical injection and detection of a spin polarized current using 1D conductors
- The Impact of Small-Angle Scattering on Ballistic Transport in Quantum Dots
- Statistical study of conductance properties in one-dimensional quantum wires focussing on the 0.7 anomaly
- Ultra-shallow quantum dots in an undoped GaAs/AlGaAs 2D electron gas
- Dependence of the 0.7 anomaly on the curvature of the potential barrier in quantum wires
Cited by in corpus (4)
- Formation of artificial Fermi surfaces with a triangular superlattice on a conventional two dimensional electron gas
- Non-adiabatic single-electron pump in a dopant-free GaAs/AlGaAs 2DEG
- Electron qubits surfing on acoustic waves: review of recent progress
- Stable electroluminescence in ambipolar dopant-free lateral p-n junctions