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2004 | 2 | 3 | 420-455
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Quantum diffusion

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Basic ideas and results which characterize quantum diffusion of defects in quantum crystals like solid helium as a new phenomenon are presented. Quantum effects in such media lead to a delocalization of point defects (vacancies, impurities etc.) and they turn into quasiparticles of a new type-defectons, which are characterized not by their position in the crystal lattice but by their quasimomentum and dispersion law. Defecton-defecton and defecton-phonon scattering are considered and an interpolation formula for the diffusion coefficient valid in all interesting temperature and concentration regions is presented. A comparison with the experimental data is made. Some alternative points of view are discussed in detail and the inconsistency of the Kisvarsanyi-Sullivan theory is shown.
Słowa kluczowe
Wydawca

Czasopismo
Rocznik
Tom
2
Numer
3
Strony
420-455
Opis fizyczny
Daty
wydano
2004-09-01
online
2004-09-01
Twórcy
  • Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee, 1784, Sofia, Bulgaria, dipushk@issp.bas.bg
Bibliografia
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