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STM/STS studies on YBa2Cu3Oy single crystals

โœ Scribed by Shukichi Tanaka; Eiji Ueda; Masatoshi Sato

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
458 KB
Volume
224
Category
Article
ISSN
0921-4534

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โœฆ Synopsis

STM/STS studies have been carried out on the ( 110) and (100) surfaces of YBa2Cu3Oy single crystals with a superconducting transition temperature Tc of about 90 K. In most cases on the (110) surface, the spectra of the quasi-particle excitations in the superconducting state exhibit characteristics of the "twin gap" structure, where the "inner gap" is much smaller than the BCS value of 3.52 ks Tc and seems to be important in discussing the temperature dependence of various quantities of the compound at low temperatures. Anisotropy of the spectra has also been observed, suggesting the anisotropic nature of the superconducting order parameter.

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