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Proceedings Paper

Femtosecond spectroscopy and new possibilities for a correlated electron system study
Author(s): Yurii E. Lozovik; S. A. Kovalenko; A. L. Dobryakov; D. V. Lisin; V. M. Farztdinov; Yu. A. Matveets; S. P. Merkulova
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Paper Abstract

The new method of investigation of Fermi surface and Fermi liquid (FL) versus non-Fermi liquid (NFL) behavior in strongly correlated electron systems by femtosecond laser spectroscopy is discussed. The method consists in the study of spectral dependence of nonequilibrium charge carriers relaxation time by femtosecond pump-supercontinuum probe technique. The usefulness of this method is demonstrated on weakly correlated electron systems in Au and Cu and strongly correlated electron system in high Tc oxide-superconductor YBa2Cu3O7-(delta ) by studying the temporary changes of optical density of thin metal films in wide spectral region of probing $HBAR(omega) probe equals 1.6 - 3.2 eV. The relaxation rate of charge carriers sharply slows down in the spectral area, related to the optical transitions into the vicinity of the Fermi level. The position of this peak gives the location of the Fermi surface (FS). The form of peak gives a unique information on the damping rate of quasiparticles near FS and thus on the FL vs NFL behavior.

Paper Details

Date Published: 5 March 1999
PDF: 8 pages
Proc. SPIE 3735, ICONO '98: Ultrafast Phenomena and Interaction of Superstrong Laser Fields with Matter: Nonlinear Optics and High-Field Physics, (5 March 1999); doi: 10.1117/12.341453
Show Author Affiliations
Yurii E. Lozovik, Institute of Spectroscopy (Russia)
S. A. Kovalenko, Humbold-Univ. zu Berlin (Germany)
A. L. Dobryakov, Institute of Spectroscopy (Germany)
D. V. Lisin, Institute of Spectroscopy (Russia)
V. M. Farztdinov, Institute of Spectroscopy (Russia)
Yu. A. Matveets, Institute of Spectroscopy (Russia)
S. P. Merkulova, Institute of Spectroscopy (Russia)


Published in SPIE Proceedings Vol. 3735:
ICONO '98: Ultrafast Phenomena and Interaction of Superstrong Laser Fields with Matter: Nonlinear Optics and High-Field Physics
Mikhail V. Fedorov; Vyacheslav M. Gordienko; Vladimir V. Shuvalov; Vladimir D. Taranukhin, Editor(s)

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