Energy transport and percolation on fractal structures with energy disorder

Abstract

Chemically mixed molecular crystals show, similarly to isotopically mixed crystals, percolation phenomena for triplet-excitation energy transport. However, because of strong guest-host interaction, energy disorder in the form of induced energy funnels masks the fractal nature of the percolating guest clusters. The assumption of a spectral dimension of d s = j for percolation at the critical concentration needs in the present case the introduction of an additional waiting-time distribution for a random-walk process.

Stretched-exponential relaxation of electric birefringence in complex liquids

“…We have also reported in table 1 the average relaxation time (z) calculated as (z) = jox R(t) dt. (7) Note that, for a pure SE, (z) = &I-( a-')z, r being the gamma function, and this relation is confirmed by our data within experimental error.…”

Optically detected NQR on matrix‐isolated organic molecules

“…The experimental set up is very similar to those of ODMR experiments [7] and has been described recently in detail [8,15,203. All experiments reported in this publication have been performed at about 1.5 K at zero magnetic field.…”