Encontrados 7 documentos, a visualizar página 1 de 1
"Magnetic Gradient" edge magnetoplasmons in non-uniform magnetic field
Balev, O. G.; Larkin, IvanIt is shown that laterally inhomogeneous strong magnetic field applied to otherwise spatially homogeneous two-dimensional electron system (2DES) allows "magnetic gradient" or special magnetic-edge magnetoplasmons (MEMPs). This mechanism is different from usual "density gradient" edge magnetoplasmons. Symmetric and antisymmetric families of MEMPs are obtained. They are localized at magnetic field inhomogeneity (...
Visualization of wave function of quantum dot at Fermi-edge singularity regime
Larkin, Ivan; Khanin, Yu N.; Vdovin, E. E.; Ujevic, Sebastian; Henini, M.We consider in this work many-body enhanced electron tunneling through an InAs quantum dot in a magnetic field applied perpendicular to the tunneling direction. We have examined in details the anisotropic behavior of the amplitude and shape of the resonant peaks.
Shubnikov-de Haas effect in tilted magnetic fields in wide quantum well
Larkin, Ivan; Ujevic, S.; Gusev, G. M.; Bakharov, A. K.; Portal, J. C.We study the magneto-resistance of a two-dimensional electron systems in a wide quantum well. We have considered two occupied subbands subjected to the tilted magnetic field in the regime of the magneto-inter-subband oscillations. We report on both experimental and theoretical studies of such a phenomenon and deduced information on the inter-subband energy gap in the presence of the in-plane magnetic field.
Visualization of wave function of quantum dot at fermi-edge singularity regime
Larkin, Ivan; Vdovin, E. E.; Khanin, Yu. N.; Ujevic, S.; Henini, M.We consider electron tunneling spectroscopy through an InAs quantum dot in a magnetic field applied perpendicular to the tunneling direction. We examine in details the anisotropic behavior of the amplitude and shape of the resonant peaks of I-V curves and concluded that (i) magnetotunneling spectroscopy at FES regime allows establishing position of resonant level in QD with high accuracy. (ii) The distinguishab...
Magnetic Gradient edge magnetoplasmons in non-uniform magnetic field
Larkin, Ivan; Balev, O. G.We have theoretically studied two-dimensional electron gas placed in a strong laterally non-uniform magnetic field, which appears due to ferromagnetic film . We have found, that in this case 2DEG experiences static charge redistribution that strongly depends on presence and configuration of the gates on the surface of a heterostructure. Also, it is shown that lateral inhomogeneity of a strong magnetic fiel...
Shubnikov - de haas effect in tilted magnetic fields in wide quantum well
Larkin, Ivan; Ujevic, S.; Wiedmann, S.; Gusev, G. M.; Portal, J. C.; Bakarov, A. K.Bilayer two-dimensional electron system in double quantum wells demonstrated oscillations of the symmetric–antisymmetric energy gap in the presence of the in-plane magnetic field [1] which has been attributed to Aharonov-Bohm interference effect between cyclotron orbits in different layers [2]. The charge distribution in a wide single quantum well is more subtle than the one in the double quantum well. Here th...
First principle calculation of potential and multi-channel transport in Fe/MgO/...
Ujevic,Sebastian; Gómez,J. A.; Larkin,Ivan A.In this work we studied the behavior of multi-channel tunneling through a realistic Fe/MgO/Fe hetero-junction ab initio potential. For this purpose we obtained Fe/MgO/Fe(001) hetero-junction effective potentials using the full potential-linear augmented plane wave WIEN2k code together with the generalized gradient approximation for the exchange-correlation potential. Multi-channel tunneling through the Fe/MgO/F...
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