FIZIKA A 8 (1999) 4 , 357-368

TESTING SOME ALTERNATIVE MODELS FOR COMPLEX LOW-ENERGY EXCITATION RELAXATION IN DENSITY WAVE SYSTEMS

A. KIŠ^a, D. PAVIČIĆ^a, D. STARE SINIĆ^a, K. BILJAKOVIĆ^a, J. C. LASJAUNIAS^b and P. MONCEAU^b

^aInstitute of Physics, HR-10 000 Zagreb, Bijenička 46, Croatia

^bCentre de Recherches sur les Trés Basses Températures, Centre National de la Recherche Scientifique, BP 166 X, 38042 Grenoble cedex, France

Dedicated to Professor Boran Leontić on the occasion of his 70^th birthday

Received 10 December 1999; revised manuscript received 3 March 2000
Accepted 6 March 2000

We apply the Palmer, Stein, Abrahams and Anderson (PSAA) model of hierarchically constrained dynamics for glassy relaxation to the complex thermal relaxation at very low temperatures in density wave systems. Alternatively, we simulate various experimental conditions in a simple, intuitive model of an electrical RC line and find some relations with the PSAA parameters.

PACS numbers: 71.45.Lr, 75.30.Fv
UDC 544.225.32

Keywords: density wave systems, glassy relaxation, complex heat relaxation, hierarchically constrained dynamics, model of Palmer, Stein, Abrahams and Anderson

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