Dynamics of Cooper pair formation in Bi2 Sr2 Ca Cu2 O8+δ

Robert A. Kaindl; Marc A. Carnahan; Daniel S. Chemla; Seongshik Oh; James N. Eckstein

doi:10.1103/PhysRevB.72.060510

Dynamics of Cooper pair formation in Bi2 Sr2 Ca Cu2 O8+δ

Robert A. Kaindl, Marc A. Carnahan, Daniel S. Chemla, Seongshik Oh, James N. Eckstein

Physics

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Abstract

We report ultrafast measurements of the transient terahertz conductivity in the high- TC superconductor Bi2 Sr2 Ca Cu2 O8+δ. After depletion of the superconducting condensate by optical excitation, the ensuing dynamics is tracked with high sensitivity at various excitation densities and temperatures. We measure low-energy spectra and shapes of decay that demonstrate a bimolecular kinetics of condensate formation on a picosecond time scale and yield a measure of quasiparticle interactions hidden in linear spectroscopy.

Original language	English (US)
Article number	060510
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	72
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.72.060510
State	Published - Aug 1 2005

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.72.060510

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AU - Eckstein, James N.

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AB - We report ultrafast measurements of the transient terahertz conductivity in the high- TC superconductor Bi2 Sr2 Ca Cu2 O8+δ. After depletion of the superconducting condensate by optical excitation, the ensuing dynamics is tracked with high sensitivity at various excitation densities and temperatures. We measure low-energy spectra and shapes of decay that demonstrate a bimolecular kinetics of condensate formation on a picosecond time scale and yield a measure of quasiparticle interactions hidden in linear spectroscopy.

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Dynamics of Cooper pair formation in Bi2 Sr2 Ca Cu2 O8+δ

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