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  • 1. Hongqi, Xu
    et al.
    Lindefelt, Ulf
    Deep levels due to vacancy pairs in silicon1989In: International Journal of Modern Physics B, ISSN 0217-9792, Vol. 3, no 6, p. 863-870Article in journal (Refereed)
  • 2.
    Mikhailov, Sergey
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Edge magnetoplasmons for a new type of quantum-well microwave detector2007In: International Journal of Modern Physics B, ISSN 0217-9792, Vol. 21, no 8-9, p. 1491-1496Article in journal (Refereed)
    Abstract [en]

    We theoretically study the wavelength and the propagation length of the edge magnetoplasmons (EMP's), running along the edge of a two-dimensional (2D) electron layer in a semiconductor quantum-well structure with and without metallic gates. We show that the metallic gate suppresses the propagation of the EMP's, but the quality factor of the wave (q'/q '', where q' and q '' are the real and imaginary parts of the complex EMP wavevector) can be larger in the gated structures as compared to the structures without the gate. The results may be useful for analysis of operation of the recently discovered microwave detectors and spectrometers operating at liquid nitrogen temperatures (Kukushkin et al., Appl. Phys. Lett. 86, 044101 (2005)).

  • 3.
    Mikhailov, Sergey
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    On the distribution of interacting fermions over single-particle quantum states2007In: International Journal of Modern Physics B, ISSN 0217-9792, Vol. 21, no 10, p. 1729-1736Article in journal (Refereed)
    Abstract [en]

    Using an exact diagonalization technique, we calculate the distribution of electrons n(nu) over single-particle quantum states in few-electron parabolic quantum dots. We show that n(nu) is a function of quantum numbers nu, but not of the energy of the states E-nu, n(nu) not equal n(E-nu). The common property n(nu) = n(E-nu) remains valid only if electron-electron interaction is neglected. For certain cases in the strong interaction regime, the occupation numbers of higher-energy levels may be larger than those of the lower-energy states: n(nu) > n(nu ') at E-nu > E-nu '.

  • 4.
    Mikhailov, Sergey
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Savostianova, Nadja
    Microwave response of a two-dimensional electron stripe: Electrodynamic effects and the influence of contacts2007In: International Journal of Modern Physics B, ISSN 0217-9792, Vol. 21, no 8-9, p. 1497-1501Article in journal (Refereed)
    Abstract [en]

    Microwave response of a two-dimensional (2D) electron stripe, supplied by two semi-infinite side contacts, is theoretically studied taking into account retardation and radiative effects. Absorption spectra of the stripe are calculated as a function of the microwave frequency omega, magnetic field B, parameters of the 2D electron gas and of the contacts. It is shown that the contacts substantially modify the position, the linewidth and the strength of the absorption resonances, leading for instance to the inversion of the absorption maxima of the right and left circularly polarized radiation in magnetic fields.

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