Abstract
Transmission measurements on YBa{sub 2}Cu{sub 3}O{sub 7} films in the spectral range 25 to 100 cm{sup {minus}1} have been performed using synchrotron radiation. In the normal state, the classical Drude conductivity function successfully explains the rise in transmission with frequency. The spectra below {ital T}{sub {ital c}} show a strong supercurrent screening of the infrared field. A temperature-dependent penetration depth is calculated from the transmission spectra using the local-limit-response kernel and a quasiparticle conductivity rising as ({ital T}/{ital T}{sub {ital c}}){sup 4}. Depending on the film quality, the zero-temperature penetration depth varies from 234 to 340 nm.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
