Electric - field effect devices made of YBa 2 Cu 307 _ x / SrTiO 3 epitaxial multilayers
نویسنده
چکیده
Three terminal superconducting electric-field effect devices, consisting of a bufferlayer of PrBa2Cu307 -x, an ultrathin layer of YBa2CuaOT_x and a SrTiO3 gate isolation layer were fabricated and successfully operated. Transmission electron microscopy and laser scanning microscopy showed that all layers are highly epitaxial and uniform over the device area. This is essentially important in the analysis of the mechanism of the electric field effect and for the reproducible fabrication of devices. With a 5 nm thick YBa2Cu3OT_x layer and an applied electric field of 0.85 MV/cm the critical current was decreased by 5% at low temperatures and up to 36% close to To. Also enhancement was obtained.
منابع مشابه
Multilayers for high-To superconducting electric field effect devices
Epitaxial multilayers, consisting of a PrBa2Cu307_ x buffer layer, ultrathin YBa2Cu307_ x and SrTiO 3, have been grown for application in electric field effect devices. Different analytical techniques indicate a sharp interface between the layers and good dielectric properties of the SrTiO3-1ayer. First measurements show clear modification of the superconductor's current-voltage characteristics...
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