ISSN:
1572-9559
Keywords:
far infrared response
;
superconductor
;
YBa2Cu3O7-δ
;
Josephson effect
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract YBa2Cu3O7-δ thin films may be epitaxially grown, on suitably prepared substrates, with a non-zero tilt angle between the film's c-axis and its surface normal. These films are fast, room-temperature, thermoelectric detectors with a response extending from UV to FIR wavelengths. We have found that tilted c-axis films, when cooled below Tc, also exhibit a fast and sensitive Josphson photoresponse to 250 µm and 496 µm radiation, in contrast to the nil response of c-axis normal films. It is believed that the non-zero component of the radiation electric field along the c-axis of tilted films modulates relatively weak Josephson critical currents in this direction, generating a photoresponse from current biased samples.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02068686
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