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Study of photoresponse of high-Tc Y-Ba-Cu-O superconducting ultrathin films using a picosecond laser pulse train (1993)

Shi, L. ; Huang, G. L. ; Lehane, C. ; [et al.]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 63 (1993), S. 2830-2832

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: We have systematically studied the photoresponse of Y-Ba-Cu-O (YBCO) ultrathin films to a train of picosecond laser pulses. The onset and decay of nonequilibrium superconductivity due to different levels of optical excitation can be observed within the single pulse train. Thermal and nonthermal responses can be clearly identified. In addition, the superconducting film resistance was found to increase progressively with laser power above the onset threshold. The YBCO thin films were possibly excited into a nonequilibrium intermediate (resistive) state from the superconducting state. The laser intensity dependence indicated a nonthermal origin for these voltage pulses.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.110301

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