| 释义 |
phason, n. Physics.|ˈfeɪzɒn|
[f. phase n. + -on1 1 b.]
1. [ad. Russ. fazón (M. A. Krivoglaz 1969, in Fizika Tverdogo Tela XI. 2230).] A region of a non-metallic material, of a different phase (see phase n. 4) from that of the surrounding material, within which an electron has become localized, thereby stabilizing the phase of the region. rare.
1970tr. M. A. Krivoglaz in Soviet Physics: Solid State XI. 1802/2 It is natural to call such formations of electrons localized near phase II regions and maintaining the equilibrium of such regions, ‘phasons’, whether the formations are mobile or essentially immobile.
2. A quantum or quasiparticle associated with any wave which displaces elements of a quasicrystalline lattice from their lattice sites. Freq. attrib. Cf. phonon n. 1.
1971A. W. Overhauser in Physical Rev. B III. 3176/2 q→ is the wave vector of a phase-modulation phonon, or ‘phason’. 1979Nature 11 Oct. 436/1 The first were originally discussed by Overhauser who suggested the name phason for these modes which consist, in fact, of fluctuations in the positions of the solitons. 1985Physical Rev. B XXXII. 5771/2 If the dynamical matrix of dimensions 6 × 6 is computed, there will be terms mixing the phonon and phason modes. 1987Nature 10 Dec. 556/1 They attributed the distortions of the pattern to phason strains in the structure. |