Abstract
A review of recent results of studying the low-temperature dynamics of a disordered solid-state medium that were obtained by the method of single molecule spectroscopy (SMS) is presented. The studies were carried out with the use of the new approach of the statistical analysis of a large number of spectra of single molecules embedded into a medium under study as a microscopic spectral probe. The measurements were performed in the range 2-7 K. The use of SMS allowed us to avoid the information losses connected with the averaging over an ensemble of impurity molecules that is inherent in conventional spectral methods. For the example of the system studied (amorphous polyisobutylene doped with molecules of tetra-tert-butylterrylene), it was shown experimentally that, at low temperatures, the spectra of single impurity molecules in disordered media obey the Levy statistics. New microscopic information on the interaction of two-level systems and quasi-local low-frequency vibrational modes of the matrix with impurity molecules in a disordered medium was obtained.
Original language | English |
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Pages (from-to) | 740-746 |
Number of pages | 7 |
Journal | Optics and Spectroscopy (English translation of Optika i Spektroskopiya) |
Volume | 98 |
Issue number | 5 |
DOIs | |
State | Published - May 2005 |
Externally published | Yes |
Bibliographical note
Funding Information:ACKNOWLEDGMENTS This study was supported by the Russian Foundation for Basic Research, project nos. 04-02-16822-a and 05-02-16521-a, and by grants from the Volkswagen-Stiftung and the Deutsche Forschungsgemein-schaft. A.V. Naumov is also grateful to the Russian Science Support Foundation and INTAS (04-83-3765) for financial support.
Funding
ACKNOWLEDGMENTS This study was supported by the Russian Foundation for Basic Research, project nos. 04-02-16822-a and 05-02-16521-a, and by grants from the Volkswagen-Stiftung and the Deutsche Forschungsgemein-schaft. A.V. Naumov is also grateful to the Russian Science Support Foundation and INTAS (04-83-3765) for financial support.
Funders | Funder number |
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INTAS | 04-83-3765 |
Russian Science Support Foundation | |
Deutsche Forschungsgemeinschaft | |
Volkswagen Foundation | |
Russian Foundation for Basic Research | 04-02-16822-a, 05-02-16521-a |