Abstract

Thermal properties of glasses are successfully described with a model consisting of two-level systems (spins) coupled to a phonon bath [1], [2]. In most treatments, it is assumed that the spin-phonon interaction is weak. However, recent detailed examinations have revealed that this assumption is not justified [3] and that, therefore, the spin-phonon interaction is important for understanding physical properties of glassy materials [4], [5]. In this paper, we examine the implications of strong spin-phonon interaction on the spectral diffusion [6].

© 1991 Optical Society of America