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We study the influence of spin-orbit coupling on the hole states in InAs/GaAs quantum dots grown on [001]- and [111]-oriented substrates belonging to symmetry point groups: C2v, C3v and D2d. We investigate the impact of various spin-orbit…

Mesoscale and Nanoscale Physics · Physics 2019-03-13 Krzysztof Gawarecki , Mateusz Krzykowski

We report on hole g-factor measurements in three terminal SiGe self-assembled quantum dot devices with a top gate electrode positioned very close to the nanostructure. Measurements of both the perpendicular as well as the parallel g-factor…

Mesoscale and Nanoscale Physics · Physics 2014-01-14 N. Ares , G. Katsaros , V. N. Golovach , J. J. Zhang , A. Prager , L. I. Glazman , O. G. Schmidt , S. De Franceschi

We investigate effects of lateral confinement on spin splitting of energy levels in 2D hole gases grown on [311] GaAs. We found that lateral confinement enhances anisotropy of spin splitting relative to the 2D gas for both confining…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 S. P. Koduvayur , L. P. Rokhinson , D. C. Tsui , L. N. Pfeiffer , K. W. West

We use numerical simulations to investigate the spin Hall effect in quantum wires in the presence of both Rashba and Dresselhaus spin-orbit coupling. We find that the intrinsic spin Hall effect is highly anisotropic with respect to the…

Mesoscale and Nanoscale Physics · Physics 2014-03-18 A. W. Cummings , R. Akis , D. K. Ferry

The influence of the spin-orbit interactions on the energy spectrum of two-electron laterally coupled quantum dots is investigated. The effective Hamiltonian for a spin qubit pair proposed in F. Baruffa et al., Phys. Rev. Lett. 104, 126401…

Mesoscale and Nanoscale Physics · Physics 2015-05-18 Fabio Baruffa , Peter Stano , Jaroslav Fabian

We address the problem of electronic and nuclear spin resonance of an individual atom on a surface driven by a scanning tunnelling microscope. Several mechanisms have been proposed so far, some of them based on the modulation of exchange…

Mesoscale and Nanoscale Physics · Physics 2019-12-25 Alejandro Ferrón , Santiago A. Rodríguez , Sergio S. Gómez , Jose L. Lado , Joaquín Fernández-Rossier

The electron Land\'e g factor ($g^{*}$) is investigated both experimentally and theoretically in a series of GaBi$_{x}$As$_{1-x}$/GaAs strained epitaxial layers, for bismuth compositions up to $x = 3.8$%. We measure $g^{*}$ via…

Zeeman splitting of 1D hole subbands is investigated in quantum point contacts (QPCs) fabricated on a (311) oriented GaAs-AlGaAs heterostructure. Transport measurements can determine the magnitude of the g-factor, but cannot usually…

Mesoscale and Nanoscale Physics · Physics 2017-02-28 A. Srinivasan , K. L. Hudson , D. S. Miserev , L. A. Yeoh , O. Klochan , K. Muraki , Y. Hirayama , O. P. Sushkov , A. R. Hamilton

We investigate the magnetic properties of the multiferroic quantum-spin system LiCu$_2$O$_2$ by electron spin resonance (ESR) measurements at $X$- and $Q$-band frequencies in a wide temperature range $(T_{\rm N1} \leq T \leq 300$\,K). The…

We investigate theoretically how the spin-orbit Dresselhaus and Rashba effects influence the electronic structure of quasi-one-dimensional semiconductor quantum dots, similar to those that can be formed inside semiconductor nanorods. We…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 C. L. Romano , S. E. Ulloa , P. I. Tamborenea

Whilst the g-factor can be anisotropic due to the spin-orbit interaction (SOI), its existence in solids cannot be simply asserted from a band structure, which hinders progress on studies from such the viewpoints. The g-factor in bismuth…

We experimentally determine isotropic and anisotropic g-factor corrections in lateral GaAs single-electron quantum dots. We extract the Zeeman splitting by measuring the tunnel rates into the individual spin states of an empty quantum dot…

Mesoscale and Nanoscale Physics · Physics 2021-08-04 Leon C. Camenzind , Simon Svab , Peter Stano , Liuqi Yu , Jeramy D. Zimmerman , Arthur C. Gossard , Daniel Loss , Dominik M. Zumbühl

Analysis of higher-order correlation functions has become a powerful tool for investigating interacting many-body systems in quantum simulators, such as quantum gas microscopes. Experimental measurements of mixed spin-charge correlation…

Strongly Correlated Electrons · Physics 2021-09-08 Yao Wang , Annabelle Bohrdt , Joannis Koepsell , Eugene Demler , Fabian Grusdt

Owing to exchange interaction between the exciton and magnetic ion, a quantum dot embedding a single magnetic ion is a great platform for optical control of individual spin. In particular, a quantum dot provides strong and sharp optical…

Mesoscale and Nanoscale Physics · Physics 2019-08-15 Aleksander Rodek , Tomasz Kazimierczuk , Aleksander Bogucki , Tomasz Smoleński , Wojciech Pacuski , Piotr Kossacki

We investigate quantum dots in semiconductor PbTe nanowire devices. Due to the accessibility of ambipolar transport in PbTe, quantum dots can be occupied both with electrons and holes. Owing to a very large dielectric constant in PbTe of…

Mesoscale and Nanoscale Physics · Physics 2022-10-12 M. Gomanko , E. J. de Jong , Y. Jiang , S. G. Schellingerhout , E. P. A. M. Bakkers , S. M. Frolov

We study the spin orbit torque arising from an intrinsic linear Dresselhaus spin-orbit coupling in a single layer III-V diluted magnetic semiconductor. We investigate the transport properties and spin torque using the linear response theory…

Mesoscale and Nanoscale Physics · Physics 2013-05-17 Hang Li , Xuhui Wang , Fatih Dogan , Aurelien Manchon

Anisotropic charge transport is observed in a two-dimensional (2D) hole system in a perpendicular magnetic field at filling factors nu=7/2, nu=11/2, and nu=13/2 at low temperature. In stark contrast, the transport at nu=9/2 is isotropic for…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 M. J. Manfra , R. de Picciotto , Z. Jiang , S. H. Simon , L. N. Pfeiffer , K. W. West , A. M. Sergent

Tunable synthetic spin-orbit coupling (s-SOC) is one of the key challenges in various quantum systems, such as ultracold atomic gases, topological superconductors, and semiconductor quantum dots. Here we experimentally demonstrate…

Hole spin qubits in quasi one-dimensional structures are a promising platform for quantum information processing because of the strong spin-orbit interaction (SOI). We present analytical results and discuss device designs that optimize the…

Mesoscale and Nanoscale Physics · Physics 2022-03-03 Christoph Adelsberger , Mónica Benito , Stefano Bosco , Jelena Klinovaja , Daniel Loss

In-plane hole g-factors measured in quantum point contacts based on p-type heterostructures strongly depend on the orientation of the magnetic field with respect to the electric current. This effect, first reported a decade ago and…

Mesoscale and Nanoscale Physics · Physics 2017-09-15 D. S. Miserev , A. Srinivasan , O. A. Tkachenko , V. A. Tkachenko , I. Farrer , D. A. Ritchie , A. R. Hamilton , O. P. Sushkov
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