Phys. Rev. B 70, 012504 (2004) [4 pages]

Electron dynamics in metallic and spin-glass cuprates

Abstract

References

Citing Articles (5)

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M. L. Schneider^1,*, M. Onellion^1,†, X. X. Xi², Xianghui Zeng², Arsen Soukiassian², P. Omernik³, and G. Taft³
¹Physics Department, University of Wisconsin, Madison, Wisconsin 53706, USA
²Physics Department, Pennsylvania State University, University Park, Pennsylvania, USA
³Department of Physics and Astronomy, University of Wisconsin, Stevens Point, Wisconsin 54481, USA

Received 9 September 2003; revised 7 January 2004; published 26 July 2004

Using femtosecond pump-probe measurements, we present transient optical reflectivity measurements of metallic, superconducting and spin-glass La_2−xSr_xCuO₄ cuprates. The rise time is temperature-independent and resolution-limited (<50 fs) for metallic sample, and is much faster than spin-glass samples (∼200 fs) at all temperatures. A divergence in the electron-lattice relaxation (τ_R) time with temperature is observed for the metallic samples, but not for spin-glass samples.

URL:

http://link.aps.org/doi/10.1103/PhysRevB.70.012504

DOI:

10.1103/PhysRevB.70.012504

PACS:

61.66.−f, 61.72.Ff

^*Present address: NIST, Electromagnetics Division (m∕s 818.03), 325 Broadway, Boulder, CO 80305; email address: michael.schneider@boulder.nist.gov

^†Email address: onellion@wisc.edu

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Phys. Rev. B 70, 012504 (2004) [4 pages]

Electron dynamics in metallic and spin-glass cuprates