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NONLINEAR SPECTROSCOPY OF Y-BA-CU-O NONEQUILIBRIUM STATES EXCITED BY PICOSECOND OPTICAL-PUMPINGстатья
Информация о цитировании статьи получена из
Scopus,
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Zherikhin A.N., Lobastov V.A., Petnikova V.M., Shuvalov V.V.
- Журнал: Physica C: Superconductivity and its Applications
- Том: 221
- Номер: 3-4
- Год издания: 1994
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 311
- Последняя страница: 318
- DOI: 10.1016/0921-4534(94)90238-0
- Аннотация: Nonequilibrium states of HTSC Y-Ba-Cu-O films with a thickness of 300 nm at the temperatures THETA = 80-85 K below the phase transition point THETA(c) congruent-to 91 K have been investigated by a biharmonic pumping (BP) technique. It has been found that as a result of optical excitation by picosecond laser pulses with the energy density of 10(-4)-10(-3) J/cm2 at the wavelengths of 1.064, 0.532 and 0.620 mum, thermodynamic equilibrium is attained only after a time delay of more than 1 ns. Both for the above-specified case and for the case with the equilibrium superconductive phase at THETA < THETA(c), we revealed the same specific dip in the self-diffraction efficiency as a function of the BP frequency detuning OMEGA in the spectral range -10 cm-1 > OMEGA> -100 cm-1. This dip conservation has been interpreted as a manifestation of a rather slow phase transition being responsible for the pairing of carriers.
- Добавил в систему: Шувалов Владимир Владимирович
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