In Situ Fabrication of Reproducible YBCO/Au Planar Tunnel Junctions with an Artificial MgO Barrier

Autor:	Shoji Tomura, Masafumi Furuyama, Masako Nasu, Ienari Iguchi, Takeshi Kusumori, Koji Shirai, Hiroaki Ohtake
Rok vydání:	1990
Předmět:	Superconductivity Fabrication High-temperature superconductivity Materials science business.industry General Engineering General Physics and Astronomy In situ fabrication Epitaxy law.invention Planar law Superconducting tunnel junction Optoelectronics Anomaly (physics) business
Zdroj:	Japanese Journal of Applied Physics. 29:L459
ISSN:	1347-4065 0021-4922
DOI:	10.1143/jjap.29.l459
Popis:	The in situ fabrication of YBCO (YBa2Cu3O y )/MgO/Au epitaxial planar tunnel junctions with a thin MgO barrier utilizing an electron-beam coevaporation technique is reported. The thickness of the MgO barrier is 3–12 nm and the tunnel resistance shows a strong dependence on barrier thickness. The fabricated tunnel junctions are highly reproducible and controllable. The observed tunnel characteristics contain the gap opening at about 20 mV and the anomaly around zero bias. The tunnel characteristics using the degraded films are also reported.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3941e4a8f51361f6f0d4ea34391c5a3e https://doi.org/10.1143/jjap.29.l459 Zobrazit plný text záznamu