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Femtosecond mid-infrared study of the high-TC superconductor YBa2Cu3O7−δ

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Abstract

Ultrafast nearinfrared excitation of optimally-doped and underdoped YBa2Cu3O7-−δ leads to an ultrafast fill-in of the (ab)-plane mid-infrared conductivity gap. Underdoped material shows two gap constituents in the transients with different recovery dynamics and saturation behaviour.

© 2000 Optical Society of America

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