# Anisotropic Pauli spin blockade in hole quantum dots

@article{Brauns2016AnisotropicPS, title={Anisotropic Pauli spin blockade in hole quantum dots}, author={Matthias Brauns and Joost Ridderbos and Ang Li and Erik P. A. M. Bakkers and Wilfred van der Wiel and Floris Arnoud Zwanenburg}, journal={Physical Review B}, year={2016}, volume={94}, pages={1-5} }

We present measurements on gate-defined double quantum dots in Ge-Si core-shell nanowires, which we tune to a regime with visible shell filling in both dots. We observe a Pauli spin blockade and can assign the measured leakage current at low magnetic fields to spin-flip cotunneling, for which we measure a strong anisotropy related to an anisotropic g factor. At higher magnetic fields we see signatures for leakage current caused by spin-orbit coupling between (1,1) singlet and (2,0) triplet…

## 33 Citations

Hole spin in tunable Ge hut wire double quantum dot

- Physics
- 2020

Holes in germanium (Ge) exhibit strong spin–orbit interaction, which can be exploited for fast and all-electrical manipulation of spin states. Here, we report transport experiments in a tunable Ge…

Single-hole physics in GaAs/AlGaAs double quantum dot system with strong spin–orbit interaction

- PhysicsSemiconductor Science and Technology
- 2021

There is rapidly expanding interest in exploiting the spin of valence-band holes rather than conduction-band electrons for spin qubit semiconductor circuits composed of coupled quantum dots. The hole…

A germanium hole spin qubit

- Physics, MedicineNature Communications
- 2018

Germanium’s electronic structure and large, tunable spin-orbit coupling makes it a good material for constructing hole-based quantum devices and two-axis control of a hole spin qubit in a germanium double quantum dot is demonstrated.

Searching strong ‘spin’-orbit coupled one-dimensional hole gas in strong magnetic fields

- 2021

There are well developed techniques for initialization, manipulation, and readout of the electron spin states in gate-defined semiconductor quantum dots [1, 2], such that the quantum dot electron…

Hole spins in GE-SI nanowires

- Physics
- 2016

In a universal quantum computer, coherent control over the state of a quantum mechanical two-level system is needed. This requires interactions of the quantum state with its environment. Inherently,…

Suppressing charge-noise sensitivity in high-speed Ge hole spin-orbit qubits

- Physics
- 2019

Strong spin-orbit interactions make hole quantum dots central to the quest for electrical spin qubit manipulation enabling fast, low-power, scalable quantum computation. Yet it is important to…

Single, double, and triple quantum dots in Ge/Si nanowires

- PhysicsApplied Physics Letters
- 2018

We report highly tunable control of holes in Ge/Si core/shell nanowires (NWs). We demonstrate the ability to create single quantum dots (QDs) of various sizes, with low hole occupation numbers and…

Single-Shot Readout of Hole Spins in Ge

- Medicine, PhysicsNano letters
- 2018

Analysis of the spin-to-charge conversion and charge readout fidelities suggest that high hole visibilities are feasible at realistic experimental conditions, underlying the potential of hole spins for the realization of viable qubit devices.

Strong Spin-Orbit Contribution to the Hall Coefficient of Two-Dimensional Hole Systems.

- Medicine, PhysicsPhysical review letters
- 2018

This work provides a general method for extracting the spin-orbit parameter from magnetotransport data, applicable even at higher temperatures where Shubnikov-de Haas oscillations and weak antilocalization are difficult to observe.

Quasiballistic quantum transport through Ge/Si core/shell nanowires.

- Materials Science, PhysicsNanotechnology
- 2017

Signals of ballistic quantum transport of holes through Ge/Si core/shell nanowires at low temperatures are studied to inform the future development of spin and topological quantum devices which rely on ballistic sub-band-resolved transport.

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