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Wavelength-dependent power-law Josephson photoresponse of a Tl2Ba2CaCu2O8 thin film

URN to cite this document:
Huggard, P. G. ; Schneider, G. ; Richter, C. ; Rickler, R. ; Prettl, Wilhelm
Date of publication of this fulltext: 04 Oct 2010 12:25


The Josephson photoresponse of a current biased granular Tl2Ba2CaCu2O8 thin film has been measured at 4.2 K for radiation frequencies ω in the range 20–111 cm-1. The resulting photosignal s depends nonlinearly on the incident power P satisfying the relationship s=K(ω)Pα(ω), where K is a frequency-dependent constant. The value of α increases monotonically from 0.5 at 20.2 cm-1 to 0.9 at 111 cm-1. ...


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