Heavy hole states in Germanium hut wires

Abstract

Hole spins have gained considerable interest in the past few years due to their potential for fast electrically controlled qubits. Here, we study holes confined in Ge hut wires, a so far unexplored type of nanostructure. Low temperature magnetotransport measurements reveal a large anisotropy between the in-plane and out-of-plane g-factors of up to 18. Numerical simulations verify that this large anisotropy originates from a confined wave function which is of heavy hole character. A light hole admixture of less than 1% is estimated for the states of lowest energy, leading to a surprisingly large reduction of the out-of-plane g-factors. However, this tiny light hole contribution does not influence the spin lifetimes, which are expected to be very long, even in non isotopically purified samples.

References in corpus (26)

• Driven coherent oscillations of a single electron spin in a quantum dot
• Silicon Quantum Electronics
• Single-shot readout of an electron spin in silicon
• Storing quantum information for 30 seconds in a nanoelectronic device
• A CMOS silicon spin qubit
• One-Dimensional Hole Gas in Germanium/Silicon Nanowire Heterostructures
• Double quantum dot with integrated charge sensor based on Ge/Si heterostructure nanowires
• Fast Single-Charge Sensing with an rf Quantum Point Contact
• Spin decoherence of a heavy hole coupled to nuclear spins in a quantum dot
• Spin Relaxation in Ge/Si Core-Shell Nanowire Qubits
• Strong Spin-Orbit Interaction and Helical Hole States in Ge/Si Nanowires
• Tunable spin-selective loading of a silicon spin qubit
• Hybrid superconductor-semiconductor devices made from self-assembled SiGe nanocrystals on silicon
• Circuit QED with Hole-Spin Qubits in Ge/Si Nanowire Quantum Dots
• Strong and Tunable Spin-Orbit Coupling of One-Dimensional Holes in Ge/Si Core/Shell Nanowires
• Highly anisotropic g-factor of two-dimensional hole systems
• Monolithic growth of ultra-thin Ge nanowires on Si(001)
• Pauli Spin Blockade of Heavy Holes in a Silicon Double Quantum Dot
• Hole Spin Coherence in a Ge/Si Heterostructure Nanowire
• On the nature of tunable hole g-factors in quantum dots
• Electric-field dependent g-factor anisotropy in Ge-Si core-shell nanowire quantum dots
• Antilocalization of Coulomb Blockade in a Ge-Si Nanowire
• Spin-3/2 physics of semiconductor hole nanowires: Valence-band mixing and tunable interplay between bulk-material and orbital bound-state spin splittings
• SiGe quantum dots for fast hole spin Rabi oscillations
• Giant anisotropy of Zeeman splitting of quantum confined acceptors in Si/Ge
• Anisotropic g factor in InAs self-assembled quantum dots

Cited by in corpus (57)

• The germanium quantum information route
• Ge hole spin qubit
• Review of performance metrics of spin qubits in gated semiconducting nanostructures
• A singlet triplet hole spin qubit in planar Ge
• Ultrafast coherent control of a hole spin qubit in a germanium quantum dot
• Direct Rashba spin-orbit interaction in Si and Ge nanowires with different growth directions
• Optimal operation points for ultrafast, highly coherent Ge hole spin-orbit qubits
• Germanium quantum well Josephson field effect transistors and interferometers
• Recent advances in hole-spin qubits
• Electrical manipulation of semiconductor spin qubits within the g-matrix formalism
• Self-controlled growth of highly uniform Ge/Si hut wires for scalable qubit devices
• Electrical control of the $g$-tensor of a single hole in a silicon MOS quantum dot
• Single-shot readout of hole spins in Ge
• Simple model for electrical hole spin manipulation in semiconductor quantum dots: Impact of dot material and orientation
• Longitudinal and transverse electric field manipulation of hole spin-orbit qubits in one-dimensional channels
• Strong influence of spin-orbit coupling on magnetotransport in two-dimensional hole systems
• Single-Particle-Picture Breakdown in laterally weakly confining GaAs Quantum Dots
• Anisotropic g-Factor and Spin-Orbit Field in a Ge Hut Wire Double Quantum Dot
• Gate-Tunable Spin-Orbit Coupling in a Germanium Hole Double Quantum Dot
• Electrical operation of planar Ge hole spin qubits in an in-plane magnetic field
• Single and Double Hole Quantum Dots in Strained Ge/SiGe Quantum Wells
• Superconducting grid-bus surface code architecture for hole-spin qubits
• Impact of interface traps on charge noise, mobility and percolation density in Ge/SiGe heterostructures
• Hole spin qubits in thin curved quantum wells
• Planar Josephson junctions in germanium: Effect of cubic spin-orbit interaction
• Progress in superconductor-semiconductor topological Josephson junctions
• Dipole coupling of a tunable hole double quantum dot in germanium hut wire to a microwave resonator
• Zero field splitting of heavy-hole states in quantum dots
• Correlations between Optical Properties and Voronoi-Cell Area of Quantum Dots
• Cavity Control over Heavy-Hole Spin Qubits in Inversion-Symmetric Crystals
• Majorana zero modes in gate-defined germanium hole nanowires
• Majorana bound states in germanium Josephson junctions via phase control
• Fast Hole Tunneling Times in Germanium Hut Wires Probed by Single-Shot Reflectometry
• Electrical control of the hole spin qubit in Si and Ge nanowire quantum dots
• Phonon-assisted relaxation and decoherence of singlet-triplet qubits in Si/SiGe quantum dots
• Interacting holes in Si and Ge double quantum dots: from a multiband approach to an effective-spin picture
• Hole spin in tunable Ge hut wire double quantum dot
• Electrical operation of hole spin qubits in planar MOS silicon quantum dots
• Entanglement control and magic angles for acceptor qubits in Si
• Anisotropic $g$-tensors in hole quantum dots: The role of the transverse confinement direction
• Vanishing Zeeman energy in a two-dimensional hole gas
• Hole weak anti-localization in a strained-Ge surface quantum well
• 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
• Spin qubit manipulation of acceptor bound states in group IV quantum wells
• Dephasing of planar Ge hole spin qubits due to 1/$\text{f}$ charge noise
• Spin-orbit enabled quantum transport channels in a two-hole double quantum dot
• Probing details of spin--orbit coupling through Pauli spin blockade
• Low-symmetry nanowire cross-sections for enhanced Dresselhaus spin-orbit interaction
• Depletion-mode Quantum Dots in Intrinsic Silicon
• Quantification of the heavy-hole--light-hole mixing in two-dimensional hole gases
• Hole spin splitting in a Ge quantum dot with finite barriers
• Hole subband dispersions and strong `spin'-orbit coupling in a cylindrical Ge nanowire
• Fully tunable hyperfine interactions of hole spin qubits in Si and Ge quantum dots
• Searching strong `spin'-orbit coupled one-dimensional hole gas in strong magnetic fields