14 papers
Excitons in the wurtzite AlGaN/GaN quantum-well heterostructures
E. P. Pokatilov, D. L. Nika, V. M. Fomin +1
We have theoretically studied exciton states and photoluminescence spectra of strained wurtzite AlGaN/GaN quantum-well heterostructures. The electron and hole energy spectra are ob…
Nucleation of superconductivity in mesoscopic star-shaped superconductors
D. A. Dikin, V. Chandrasekhar, V. R. Misko +2
We study the phase transition of a star-shaped superconductor, which covers smoothly the range from zero to two dimensions with respect to the superconducting coherence length. Det…
Shape of nanosize superconducting grains: Does it influence pairing characteristics?
V. N. Gladilin, V. M. Fomin, J. T. Devreese
The Richardson exact solution for the reduced BCS Hamiltonian is applied to examine how sensitive are the pairing characteristics (condensation energy, spectroscopic gap, parity ga…
Electron and hole states in quantum-dot quantum wells within a spherical 8-band model
E. P. Pokatilov, V. A. Fonoberov, V. M. Fomin +1
In order to study heterostructures composed both of materials with strongly different parameters and of materials with narrow band gaps, we have developed an approach, which combin…
Development of an eight-band theory for quantum-dot heterostructures
E. P. Pokatilov, V. A. Fonoberov, V. M. Fomin +1
We derive a nonsymmetrized 8-band effective-mass Hamiltonian for quantum-dot heterostructures (QDHs) in Burt's envelope-function representation. The 8x8 radial Hamiltonian and the…
Temperature Dependence of the Cyclotron Mass in n-Type CdS
J. T. Devreese, V. M. Fomin, V. N. Gladilin +2
Recent cyclotron resonance experiments in n-type CdS at ultra-high magnetic fields have revealed a pronounced maximum of the electron cyclotron mass as a function of temperature. I…