Optical excitation of quasiparticle pairs in the vortex core of high- T sub c superconductors

Journal Article · Mon Jul 06 00:00:00 EDT 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.69.152· OSTI ID:7177189

Karraie, K; Choi, E J; Dunmore, F; Liu, S H; Drew, H D ^[1]; Li, Q; Fenner, D B ^[2]; Zhu, Y D; Zhang, F ^[3]

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1. Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742 (United States) Laboratory for Physical Sciences, College Park, Maryland 20740 (United States)
2. Advanced Fuel Research, E. Hartford, Connecticut 06138 (United States)
3. Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221 (United States)

A far-infrared resonance has been observed in superconducting YBa{sub 2}Cu{sub 3}O{sub 7} thin films in the presence of high magnetic fields. It corresponds to the quasiparticle pair creation process inside the vortex core. The resonance frequency is {omega}{sub 0}=1.3{ital kT}{sub {ital c}}/{h bar} with a linewidth 1/{tau}{congruent}0.6{omega}. This value for {omega}{sub 0} implies, within BCS theory, a large energy gap in YBa{sub 2}Cu{sub 3}O{sub 7}.

• OSTI ID: 7177189
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 69:1; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BCS THEORY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ENERGY GAP
ENERGY-LEVEL TRANSITIONS
EXCITATION
HIGH-TC SUPERCONDUCTORS
INFRARED SPECTRA
INTERACTIONS
LINE WIDTHS
MAGNETIC FLUX
MIXED STATE
OXIDES
OXYGEN COMPOUNDS
PAIR PRODUCTION
PARTICLE PRODUCTION
QUASI PARTICLES
RESONANCE
SPECTRA
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
VORTICES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES