North Carolina Central University

Resonance Tunneling in Concentric Quantum Rings

Nimmo J., North Carolina Central University, US

In the present work, the phenomenon known as resonance tunneling due to the presents of a magnetic field perpendicular to the surface of double concentric rings (DCQR) is presented. It has shown that in the [...]

tunneling rate in chaotic quantum system

Filikhin I., Matinyan S.G., Vlahovic B., North Carolina Central University, US

We study electron spectra and electron tunneling in double quantum systems: quantum wells (QWs), quantum dots (QDs) and quantum rings (QRs). We especially study the relation between their chaotic properties and tunneling. In particular we [...]

Anti-Crossing Levels and Electron Tunneling in Quantum Rings

Filikhin I., Matinyan S.G., Nimmo J., Vlahovic B., North Carolina Central University, US

Quantum Rings (QR) attracted attention during the last decade because of remarkable meso and nano-structures, due to non-simple connected topology. In our work [3] it was shown that in the weakly coupled double concentric quantum [...]

Dynamical Tunneling in the Systems of Double Quantum Dots and Rings

Filikhin I., Matinyan S.G., Vlahovic B., North Carolina Central University, US

We are modeling the InAs double QDs and QRs, embedded into the GaAs substrate. For the numerical modeling we apply an effective approach] in which the combined effect of strain, piezoelectricity and interband interactions are [...]

Plasmon Generation by Excitons in Carbon Nanotubes

Bondarev I.V., Antonijevic T., North Carolina Central University, US

Optically excited excitons are theoretically demonstrated to generate and amplify plasmons in individual semiconducting carbon nanotubes. Plasmons are coherent charge density waves due to the periodic opposite-phase displacements of the electron shells with respect to [...]

C-V Data and Geometry Parameters of Self-Assembled INAS/GAAS Quantum Rings

Filikhin I., Suslov V.M., Vlahovic B., North Carolina Central University, US

In present work we focus on these problems and on the interpretation of the recent CV data given in W. Lei, C. Notthoff, A. Lorke, D. Reuter and A. D. Wieck (Appl. Phys. Lett. 96, [...]

Electron Transition Between Weakly Coupled Concentric Quantum Rings

Filikhin I., Matinyan S.G., Nimmo J., Vlahovic B., North Carolina Central University, US

We investigate the electron wavefunction localization in double concnetric quantum rings when a magentic field is applied.

Neighbouring Levels Statistic and Shape of Quantum Dots: Si/Sio2

Filikhin I., Matinyan S.G., Vlahovic B., North Carolina Central University, US

We model the Si quantum dots (QDs) embedded into the SiO2 substrate. Single sub-band effective mass approach is used to calculate energy levels of electrons and heavy holes. For weak confinement regime (QD size D [...]

The INGAAS/GAAS Quantum Dots Under Effective and Ab Initio Treatments: Comparison and Results

Filikhin I., Suslov V.M., Vlahovic B., North Carolina Central University, US

An effective approach for describing the electronic structure of InGaAs/GaAs quantum dots (QDs) is presented. We model QDs based on a single sub-band approach with an energy dependent electron effective mass. The model assumes that [...]

INGAAS/GAAS Quantum Dot With Material Mixing

Filikhin I., Suslov V.M., Vlahovic B., North Carolina Central University, US

We model an InGaAs/GaAs quantum dot having dependence of the Ga fraction along vertical axis. The effect of material mixing on the electron energy spectra is considered. This theoretical model is based on a single [...]