Cylindrical semiconductor nanowires with constrictions

Racec, Paul N.

doi:10.1002/pssb.201349248

Cited by 3 publications

(1 citation statement)

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“…the CSN in contact with the external leads, we use the scattering formalism based on the R-matrix method. This method has been used in similar transport problems in quantum dots connected to the leads via quantum point contacts [25], in planar nanotransistors [26,27], or in cylindrical bulk nanowires with radial constrictions, at zero magnetic field [28][29][30][31]. The approach consists of two parts.…”

Section: The Computational Methodsmentioning

confidence: 99%

Conductance oscillations of core-shell nanowires in transversal magnetic fields

et al. 2016

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We analyze theoretically electronic transport through a core-shell nanowire in the presence of a transversal magnetic field. We calculate the conductance for a variable coupling between the nanowire and the attached leads and show how the snaking states, which are low-energy states localized along the lines of vanishing radial component of the magnetic field, manifest their existence. In the strong coupling regime they induce flux periodic, Aharonov-Bohm-like, conductance oscillations, which, by decreasing the coupling to the leads, evolve into well resolved peaks. The flux periodic oscillations arise due to interference of the snaking states, which is a consequence of backscattering at either the contacts with leads or magnetic/potential barriers in the wire.

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Section: The Computational Methodsmentioning

confidence: 99%

Conductance oscillations of core-shell nanowires in transversal magnetic fields

et al. 2016

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Cylindrical semiconductor nanowires with constrictions

Racec

2013

Physica Status Solidi (b)

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The energy dependence of the tunneling coefficient for a cylindrical semiconductor nanowire, i.e., a one‐dimensional electron gas, with two constrictions is studied. Using the R‐matrix formalism the localization probabilities at the resonant energies can be computed. They give decisive information about the physical meaning of the resonant peaks and dips that appear. The nanowire with two constrictions yields a well‐defined system for the experimental evidence of the quasi‐bound states of the evanescent channels. Clearly marked dips due to them should appear in the linear conductance at low temperatures. Tunneling coefficient Tfalse(mfalse) for a cylindrical nanowire with one or two constrictions, for a specific magnetic quantum number m. The influences of the geometrical parameters on the resonant energies are also shown.

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Concentration, thermodynamic density of states, and entropy of electrons in semiconductor nanowires

Gulyamov

Davlatov

Juraev

2022

Low Temperature Physics

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Approximate equations for the concentration of charge carriers, the thermodynamic density of states, and the entropy of electrons in semiconductor nanowires are obtained. To find the charge carrier concentration, the equation for the total number of particles was used. Using various approximate expressions for the Fermi–Dirac distribution function, approximate equations for charge carrier concentration, thermodynamic density of states, and entropy are obtained, and graphs of their dependences on the chemical potential at different temperatures are constructed and analyzed. The graphs of the temperature dependence of the chemical potential are presented and analyzed. Using the thermodynamic density of states, the temperature dependences of the energy levels and the thermal coefficients of changes in these levels are obtained.

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Cylindrical semiconductor nanowires with constrictions

Cited by 3 publications

References 40 publications

Conductance oscillations of core-shell nanowires in transversal magnetic fields

Conductance oscillations of core-shell nanowires in transversal magnetic fields

Cylindrical semiconductor nanowires with constrictions

Concentration, thermodynamic density of states, and entropy of electrons in semiconductor nanowires

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