Femtosecond dynamics of quasi-particles in YBa2Cu3O7-δ superconductor films

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Publication Type Journal Article
School or College College of Science
Department Physics
Creator Vardeny, Zeev Valentine; Symko, Orest George
Other Author Han, S. G.; Koren, G.
Title Femtosecond dynamics of quasi-particles in YBa2Cu3O7-δ superconductor films
Date 1991-03
Description We have studied the transient electronic response of YBa2Cu307-δ epitaxialy grown H T c superconductor thin films in the femtosecond time domain, using transient photoinduced reflectivity (AR) with 60 fsec time resolution. For temperatures T>Tc only a bolometric signal was observed with ARrO. For T<Tc, AR<O with a temperature dependent rise time of order 300 fsec followed by a relaxation (of order 3 psec) into a state with ARzO. The results for T<Tc are explained in terms of quasi-particle (QP) electronic response giving AR<O. Thus the femtosecond rise time is interpreted as avalanche multiplication of QP across the gap 2A and the subsequent picosecond relaxation as QP recombination. The QP optical response is explained within the two fluid model.
Type Text
Publisher Institute of Electrical and Electronics Engineers (IEEE)
Journal Title IEEE Transactions on Magnetics
Volume 27
Issue 2
First Page 1548
Last Page 1551
DOI 10.1109/20.133479
citatation_issn 189464
Subject Femtosecond dynamics; YBa2Cu3O7-8; Transient electronic response; Transient optical response
Subject LCSH Femtochemistry; Superconductors -- Optical properties; Quasiparticles (Physics); Thin films -- Optical properties; Superconductors
Language eng
Bibliographic Citation Han, S. G., Vardeny, Z. V., Symko, O. G., & Koren, G. (1991). Femtosecond dynamics of quasi-particles in YBa2Cu3O7-δ superconductor films. IEEE Transactions on Magnetics, 27(2), 1548-51.
Rights Management (c) 1991 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. http://dx.doi.org/10.1109/20.133479
Format Medium application/pdf
Format Extent 287,587 bytes
Identifier ir-main,9678
ARK ark:/87278/s6dn4p5t
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2021-05-06
ID 702538
Reference URL https://collections.lib.utah.edu/ark:/87278/s6dn4p5t
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