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Response-theory for nonresonant hole burning: Stochastic dynamics | | Gregor Diezemann
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28 Feb 2000 | | Subject: | cond-mat | | Affiliation: | Universitaet Mainz | | Abstract: | Using non-linear response theory the time signals relevant for nonresonant spectral hole burning are calculated. The step-reponse function following the application of a high amplitude ac field (pump) and an intermediate waiting period is shown to be the sum of the equilibrium integrated response and a modification due to the preparation via ac irradiation. Both components are calculated for a class of stochastic dipole reorientation models. The results indicate that the method can be used for a clearcut distinction of homogeneously and heterogeneously broadened susceptibilities as they occur in the relaxation of supercooled liquids or other disordered materials. This is because only in the heterogeneous case is a frequency selective modification of the response possible. | | Source: | arXiv, cond-mat/0002435 | | Services: | Forum | Review | PDF | Favorites | |
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