English
Related papers

Related papers: Transconductance and effective Land\'e factors for…

200 papers

In this work, we study the effects of a transverse magnetic field in a Kondo lattice model with two $f$ orbitals interacting with the conduction electrons. The $f$ electrons that are present on the same site interact through Hund's…

Strongly Correlated Electrons · Physics 2023-08-16 Christopher Thomas , Sébastien Burdin , Claudine Lacroix

We study numerically the low-temperature electronic transport properties of a single-ion magnet with uniaxial and transverse spin anisotropies. We find clear signatures of a Kondo effect caused by the presence of a transverse (zero-field)…

Mesoscale and Nanoscale Physics · Physics 2015-06-19 Javier I. Romero , E. Vernek , G. B. Martins , E. R. Mucciolo

The ground states of few electrons confined in two vertically coupled quantum rings in the presence of an external magnetic field are studied systematically within the current spin-density functional theory. Electron-electron interactions…

Mesoscale and Nanoscale Physics · Physics 2009-10-05 L. K. Castelano , G. -Q. Hai , B. Partoens , F. M. Peeters

We investigate transport properties of stable gate-defined quantum dots formed in an InSb$_{0.87}$As$_{0.13}$ quantum well. High $\textit{g}$-factor and strong spin-orbit-coupling make InSb$_x$As$_{1-x}$ a promising platform for exploration…

Mesoscale and Nanoscale Physics · Physics 2023-11-13 S. Metti , C. Thomas , M. J. Manfra

We show how the in-plane magnetic field, which breaks time-reversal and rotational symmetries of the orbital motion of electrons in a heterostructure due to the momentum-dependent inter-subband mixing, affects weak localisation correction…

Mesoscale and Nanoscale Physics · Physics 2009-11-07 Vladimir I. Fal'ko , Tomas Jungwirth

We reveal the existence of a large in-plane heavy-hole $g$ factor in symmetric self-assembled (001) (In,Ga)As/GaAs quantum dots due to warping of valence band states. This warping dominates over the well-established mechanism associated…

The effect of an electric field on spin precession in In0.5Ga0.5As/GaAs self-assembled quantum dots is calculated using multiband real-space envelope-function theory. The dependence of the Lande' g tensor on electric fields should permit…

Mesoscale and Nanoscale Physics · Physics 2015-05-20 Joseph Pingenot , Craig E. Pryor , Michael E. Flatté

We study the effects of magnetic and electric fields on the g-factors of spins confined in a two-electron InAs nanowire double quantum dot. Spin sensitive measurements are performed by monitoring the leakage current in the Pauli blockade…

Mesoscale and Nanoscale Physics · Physics 2013-07-24 M. D. Schroer , K. D. Petersson , M. Jung , J. R. Petta

Using a magnetocapacitance technique, we determine the magnetic field of the spin transition, B*, at filling factor nu=2/3 in the 2D electron system in GaAs/AlGaAs heterojunctions. The field B* is found to decrease appreciably as the wave…

Mesoscale and Nanoscale Physics · Physics 2013-02-15 V. V. Vanovsky , V. S. Khrapai , A. A. Shashkin , V. Pellegrini , L. Sorba , G. Biasiol

We examine the influence of the superconducting proximity effect on the transport properties of a T-shaped double quantum dot strongly coupled to two normal, nonmagnetic or ferromagnetic leads. We show that the two-stage Kondo screening may…

Mesoscale and Nanoscale Physics · Physics 2018-07-02 Krzysztof P. Wójcik , Ireneusz Weymann

In this letter we explore how the microscopic dynamics of charge transfer (CT) excitons are influenced by the presence of an external magnetic field in disordered molecular semiconductors. This influence is driven by the dynamic interplay…

Chemical Physics · Physics 2016-06-03 Chee Kong Lee , Liang Shi , Adam P. Willard

We use a generalized master equation (GME) to describe the nonequilibrium magnetotransport of interacting electrons through a broad finite quantum wire with an embedded ring structure. The finite quantum wire is weakly coupled to two broad…

Mesoscale and Nanoscale Physics · Physics 2012-03-15 Vidar Gudmundsson , Chi-Shung Tang , Olafur Jonasson , Valeriu Moldoveanu , Andrei Manolescu

Strong magnetic field pulses associated with a relativistic electron bunch can imprint switching patterns in magnetic thin films that have uniaxial in-plane anisotropy. In experiments with Fe and FeCo alloy films the pattern shape reveals…

Mesoscale and Nanoscale Physics · Physics 2017-02-24 Ioan Tudosa

The transport properties of a large-spin molecule strongly coupled to ferromagnetic leads in the presence of transverse magnetic anisotropy are studied theoretically. The relevant spectral functions, linear-response conductance and the…

Mesoscale and Nanoscale Physics · Physics 2015-11-13 Maciej Misiorny , Ireneusz Weymann

Motivated by recent experiments, we study the interaction corrections to the damping of magnetooscillations in a two-dimensional electron gas (2DEG). We identify leading contributions to the interaction-induced damping which are induced by…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Y. Adamov , I. V. Gornyi , A. D. Mirlin

We study the anisotropic orbital effect in the electric field tunability of the phonon induced spin-flip rate in quantum dots (QDs). Our study shows that anisotropic gate potential enhances the spin-flip rate and reduces the level crossing…

Mesoscale and Nanoscale Physics · Physics 2012-01-17 Sanjay Prabhakar , Roderick V. N. Melnik , Luis L. Bonilla

We study the effects of an external magnetic field on the superconducting properties of a quasi-two-dimensional system of Dirac electrons at an arbitrary temperature. An explicit expression for the superconducting gap is obtained as a…

Superconductivity · Physics 2008-11-26 E. C. Marino , Lizardo H. C. M. Nunes

The conductance of a point contact between two hopping insulators is expected to be dominated by the individual localized states in its vicinity. Here we study the additional effects due to an external magnetic field. Combined with the…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 V. I. Kozub , A. A. Zyuzin , O. Entin-Wohlman , A. Aharony , Y. M. Galperin , V. Vinokur

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

We show that in the metallic phase of a two dimensional electron gas the spin-orbit coupling due to structure inversion asymmetry leads to a characteristic anisotropy in the magnetoconductance. Within the assumption that the metallic phase…

Mesoscale and Nanoscale Physics · Physics 2016-08-31 P. Schwab , R. Raimondi
‹ Prev 1 3 4 5 6 7 10 Next ›