Quantum effects in magnetotransport of InGaAs quantum wells with remote Mn impurities

L. Morgun

doi:10.1051/epjconf/201818506007

Publications

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Quantum effects in magnetotransport of InGaAs quantum wells with remote Mn impurities

P. 1–4.

Morgun L.

WehavestudiedmagnetoresistanceandHalleffectofGaAs/InxGa1−xAsquantumwellswithremoteMnimpurity.Temperatureandmagneticfielddependenciesofsamplesresistivityindicateseveraleffectsrelatedtothemagneticsubsystem.Shubnikov-deHaasoscillationsindicatethepresenceofseveraltypesofregionsinconductionchannelwithsignificantlydifferentholemobilities.Wediscussedtheimpactofmagneticimpu-ritiesonquantumcorrectionstoconductivitybycomparingourresultswiththedataforsimilarnon-magneticstructures.OurresultssuggestthatthepresenceofMnatomsleadstothedampingofquantumcorrectionsinintheinvestigatedstructures.

Language: English

DOI

Keywords: quantum effects in charge transport Magnetotransport InGaAs

In book

EPJ Web of Conferences

Vol. 185: Moscow International Symposium on Magnetism (MISM 2017) . , EDP Sciences, 2018.

Study of planar microcavity structure with In0.63Ga0.37As quantum dots and non-absorbing Al0.2Ga0.8As/Al0.9Ga0.1As mirrors

Babichev A. V., Papylev D. S., S. D. Komarov et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2024 Vol. 17 No. 3.1 P. 233–237

The planar microcavity structure based on non-absorbing Al0.2Ga0.8As/Al0.9Ga0.1As mirrors was fully fabricated by molecular-beam epitaxy. Usage of In0.63Ga0.37As quantum dots reveals room temperature emission near 1110 nm with emission bandwidth of about 80 meV. The determined spectral mismatch between peak position of gain region and reflectivity spectrum dip was about 115 meV at 290 K. ...

Added: May 14, 2025

Comparative Analysis of InGaAs/GaAs Quantum Dots Produced by Various Epitaxial Techniques

Babichev A., Sergey D. Komarov, Tkach J. et al., , in: 2022 International Conference on Electrical Engineering and Photonics (EExPolytech) Proceedings.: St. Petersburg: IEEE, 2022. P. 253–256.

Added: May 31, 2024

Magnetic field induced activated and quantum creep of charge density waves in o−TaS3

I.A. Cohn, S.V. Zaitsev-Zotov, Physical Review B: Condensed Matter and Materials Physics 2023 Vol. 108 No. 11 Article 115124

We demonstrate that magnetoresistance of creeping charge-density waves in the quasi-one-dimensional conductor o-TaS 3 changes its character from a negative parabolic at T 10 K, where it obeys the 1/T 2 law to a weakly temperature-dependent negative nearly linear one at lower temperatures. The dominant contribution into the negative parabolic magnetoresistance comes from magnetic field induced ...

Added: October 25, 2023

Time-resolved temperature-dependent photoluminescence spectroscopy of InGaAs/GaAs quantum well-dots

Konstantin A. Ivanov, Alexey M. Nadtochiy, Natalia V. Kryzhanovskaya et al., Journal of Luminescence 2023 Vol. 255 Article 119620

The paper presents the results of a study of dynamic properties of InGaAs quantum well-dots (QWD) embedded in a GaAs matrix carried out by time-resolved photoluminescence (TRPL) in the temperature range of 10–300 K. The time dependence of the PL shows a long region of constant signal intensity. It was attributed to the filling of ...

Added: December 24, 2022

Localization of helical edge states in the absence of external magnetic field

Bubis A. V., Mikhailov N. N., Dvoretsky S. A. et al., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 104 Article 195405

Theoretically, the helical edge states of two-dimensional topological insulators are protected from coherent backscattering due to nonmagnetic disorder provided electron interactions are not too strong. Experimentally, the edges typically do not demonstrate systematic and robust quantization, but at the same time little is known about the sub-Kelvin temperature behavior. Here, we report the surprising localization of the edge ...

Added: February 2, 2022

Magnetotransport and internodal tunnelling in Weyl semimetals

Bednik G., K. S. Tikhonov, Syzranov S. V., Physical Review Research 2020 Vol. 2 P. 023124-1–023124-15

Internodal dynamics of quasiparticles in Weyl semimetals manifest themselves in hydrodynamic, transport, and thermodynamic phenomena and are essential for potential valleytronic applications of these systems. In an external magnetic field, coherent quasiparticle tunnelling between the nodes modifies the quasiparticle dispersion and, in particular, opens gaps in the dispersion of quasiparticles at the zeroth Landau level. ...

Added: November 12, 2020

Topological Protection Brought to Light by the Time-Reversal Symmetry Breaking

Piatrusha S. U., E.S. Tikhonov, Kvon Z. D. et al., Physical Review Letters 2019 Vol. 123 No. 5 P. 056801-1–056801-6

Recent topological band theory distinguishes electronic band insulators with respect to various symmetries and topological invariants, most commonly, the time reversal symmetry and the Z2 invariant. The interface of two topologically distinct insulators hosts a unique class of electronic states—the helical states, which shortcut the gapped bulk and exhibit spin-momentum locking. The magic and so ...

Added: July 30, 2019