Research Papers in Physics and Astronomy


Date of this Version

December 1990


Published by American Physical Society. Phys. Rev. Lett., 65, 3445(1990). Copyright © 1990 American Physical Society. Permission to use.


We present femtosecond time-resolved measurements on the high-Tc superconductor Tl2Ba2Ca2Cu3O10. At temperatures below Tc, we observe a relaxation process which is distinct from the equilibration of hot carriers in the normal state. Our results demonstrate an increasing relaxation rate as the superconducting gap opens. This is consistent with the behavior of conventional metallic superconductors.

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