Перегляд за автором "Leshko, R.Ya."

Сортувати за: Порядок: Результатів:

  • Analysis of the effect of polarization traps and shallow impurities on the interlevel light absorption of quantum dots 
    Boichuk, V.I.; Leshko, R.Ya.; Karpyn, D.S. (Condensed Matter Physics, 2017)
    A spherical quantum dot (QD) heterosystem CdS/SiO2 has been studied. Each QD has a hydrogen-like impurity in its center. Besides that, it has been accounted that a polarization trap for electron exists at the interfaces ...
  • Hole, impurity and exciton states in a spherical quantum dot 
    Boichuk, V.I.; Bilynskyi, I.V.; Leshko, R.Ya. (Condensed Matter Physics, 2010)
    The 3x3 kp hole Hamiltonian for the wave-function envelopes (effective mass Hamiltonian) was used for calculation of discrete states of the hole and acceptor hydrogenic impurity in a spherical Si/SiO2 nanoheterostructure ...
  • Hydrogenic impurity in a bilayer spherical quantum dot 
    Boichuk, V.I.; Bilynskyi, I.V.; Leshko, R.Ya. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2009)
    In the work, on the basis of the exact solution of the Poisson equation for a bilayer quantum dot with a positively charged donor ion in its centre, determined is the potential energy of interaction of this impurity ion ...
  • Interlevel absorption of electromagnetic waves by nanocrystal with divalent impurity 
    Boichuk, V.I.; Leshko, R.Ya. (Condensed Matter Physics, 2014)
    The energy spectrum of central divalent impurity is calculated using the effective mass approximation in a spherical quantum dot (QD). The dipole moment and oscillator strength of interlevel transition is defined. The ...
  • Off-central acceptor impurity in a spherical quantum dot 
    Boichuk, V.I.; Leshko, R.Ya.; Bilynskyi, I.V.; Turyanska, L.M. (Condensed Matter Physics, 2012)
    The hole energy spectrum with the ion of an acceptor impurity in the quantum dot has been calculated using the spherical approximation of the multiband Luttinger model. The dependence of the hole energy levels on the ...
  • Optical spectra of small CdS nanocrystals 
    Boichuk, V.I.; Leshko, R.Ya.; Holskyi, V.B.; Karpyn, D.S. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2016)
    Determined in this work is the energy of surface states related with polarization charges at the interfaces. This energy was compared with that of electron internal states. Dipole momentum matrix elements of the interlevel ...
  • Study of an Acceptor Impurity Located at the Center of a Sperical Nanoheterostructure 
    Boichuk, V.I.; Bilynskyi, I.V.; Leshko, R.Ya.; Shakleina, I.O. (2010)
    Using the spherical 4x4 Hamiltonian, the discrete states of a hydrogenic acceptor impurity in a spherical GaSb/AlSb nanoheterostructure with various quantum-dot sizes are determined. The energies obtained are compared with ...
  • The effect of polarization charges on energy of univalent and bivalent donors in a spherical quantum dot 
    Boichuk, V.I.; Bilynskyi, I.V.; Leshko, R.Ya. (Condensed Matter Physics, 2008)
    The energy of electrons of univalent and bivalent impurity of a spherical β -HgS/CdS nanoheterostructure is calculated as a function of quantum dot radius by the variation technique in the case of finite and infinite ...