Physics – Condensed Matter – Statistical Mechanics
Scientific paper
1997-08-21
Physics
Condensed Matter
Statistical Mechanics
10 pages, Revtex, 6 eps-figures, accepted for publication in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.56.11571
A quantitative theory is developed, which accounts for heating artifacts in three-pulse photon echo (3PE) experiments. The heat diffusion equation is solved and the average value of the temperature in the focal volume of the laser is determined as a function of the 3PE waiting time. This temperature is used in the framework of nonequilibrium spectral diffusion theory to calculate the effective homogeneous linewidth of an ensemble of probe molecules embedded in an amorphous host. The theory fits recently observed plateaus and bumps without introducing a gap in the distribution function of flip rates of the two-level systems or any other major modification of the standard tunneling model.
Haarer Dietrich
Neu Peter
Silbey Robert J.
Zilker Stephan J.
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