Tunneling observation of the finite superconducting gap in YBa2Cu3Oy

✍ Scribed by Hironaru Murakami; Syuzo Ohbuchi; Ryozo Aoki

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 172 KB
• Volume: 235-240
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)92165-2

✦ Synopsis

Unlversl ty, Yamada-Electrpu tunneling,study onfBa~Cu3Or..was carried out.~or lnvestl~atlon?f an essential superconducting gap struccure.Beslues usua~ ai~ junction, a KtnQ el mcro-oreag ~x~ junction was prepareu ln-sttu on a low-temperature scanning tunneling microscope/spectroscope (LT-STM/STS) stage in order to minimize the influence of the surface-degradaHon. As the result,the observed tunneIlng spectra showed finite superconducting gap structure wlth extremely low and flat In-gap density of states, which Indicates a quite different character from the gapless one expected by the d-~ave pairing theory.