Anisotropic Pauli spin blockade in hole quantum dots

Abstract

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 states. Taking into account these anisotropic spin-flip mechanisms, we can choose the magnetic field direction with the longest spin lifetime for improved spin-orbit qubits.

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• Quantum Computing
• Electron transport through double quantum dots
• Silicon Quantum Electronics
• An addressable quantum dot qubit with fault-tolerant control fidelity
• Storing quantum information for 30 seconds in a nanoelectronic device
• Spin-flip transitions between Zeeman sublevels in semiconductor quantum dots
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• Hole Spin Coherence in a Ge/Si Heterostructure Nanowire
• Tunable g factor and phonon-mediated hole spin relaxation in Ge/Si nanowire quantum dots
• Electric-field dependent g-factor anisotropy in Ge-Si core-shell nanowire quantum dots
• Magnetic field dependence of Pauli spin blockade: a window into the sources of spin relaxation in silicon quantum dots
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Cited by in corpus (33)

• The germanium quantum information route
• Ge hole spin qubit
• Optimal operation points for ultrafast, highly coherent Ge hole spin-orbit qubits
• Strong spin-orbit interaction and $g$-factor renormalization of hole spins in Ge/Si nanowire quantum dots
• Generating a topological anomalous Hall effect in a non-magnetic conductor
• Single-shot readout of hole spins in Ge
• Single, double, and triple quantum dots in Ge/Si nanowires
• Strong influence of spin-orbit coupling on magnetotransport in two-dimensional hole systems
• Multiple Andreev reflections and Shapiro steps in a Ge-Si nanowire Josephson junction
• Spin blockade as a probe of Zeeman interactions in hole quantum dots
• Spin-orbit interaction and induced superconductivity in an one-dimensional hole gas
• Gate-Tunable Spin-Orbit Coupling in a Germanium Hole Double Quantum Dot
• Anisotropic g-Factor and Spin-Orbit Field in a Ge Hut Wire Double Quantum Dot
• Electrical operation of planar Ge hole spin qubits in an in-plane magnetic field
• Josephson effect in a few-hole quantum dot
• Highly tuneable hole quantum dots in Ge-Si core-shell nanowires
• Hyperfine and spin-orbit coupling effects on decay of spin-valley states in a carbon nanotube
• Dipole coupling of a tunable hole double quantum dot in germanium hut wire to a microwave resonator
• Ballistic quantum transport through Ge/Si core/shell nanowires
• Hole spin in tunable Ge hut wire double quantum dot
• Electrical operation of hole spin qubits in planar MOS silicon quantum dots
• Identifying Pauli spin blockade using deep learning
• Signatures of quantum mechanical Zeeman effect in classical transport due to topological properties of two-dimensional spin-3/2 holes
• Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits
• Low-energy subband wave-functions and effective $g$-factor of one-dimensional hole gas
• Non-linear anomalous Hall effect of two-dimensional spin-3/2 heavy holes
• Dephasing of planar Ge hole spin qubits due to 1/$\text{f}$ charge noise
• Isotropic and Anisotropic g-factor Corrections in GaAs Quantum Dots
• Hole subband dispersions and strong `spin'-orbit coupling in a cylindrical Ge nanowire
• Direct measurement of spin-flip rates in single-electron tunneling
• Acoustic phonons, spin-phonon coupling and spin relaxation via the lattice reorientation mechanism in hexagonal germanium nanowires
• Pauli spin blockade at room temperature in double-quantum-dot tunneling through individual deep dopants in silicon
• Searching strong `spin'-orbit coupled one-dimensional hole gas in strong magnetic fields