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Evidence for two-component high-temperature superconductivity in the femtosecond optical response of YBa2Cu3O7-delta

Abstract:

Femtosecond time-resolved spectrocopy has been used to investigate electronic excitations contributing to the superconducting gap function Δ(ω, T) in YBa 2Cu 3O 7-δ. The optical response is strongly peaked at 1.5 eV, and contains two distinct components: one with a characteristic relaxation time of ∼5 ps, whose amplitude displays a two-fluid-like temperature dependence, and a long-lived component (>10 ns) which is consistent with localized quasiparticle states at the Fermi energy. The latt...

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Publication status:
Published

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Publisher copy:
10.1103/PhysRevLett.78.2212

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Institution:
University of Oxford
Department:
Oxford, MPLS, Engineering Science
Role:
Author
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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
Role:
Author
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Journal:
PHYSICAL REVIEW LETTERS
Volume:
78
Issue:
11
Pages:
2212-2215
Publication date:
1997-03-17
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:3af0c7a9-f6c5-4c4e-a9e8-aff337a45dd0
Source identifiers:
16576
Local pid:
pubs:16576
Language:
English

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