LT-STM/STS observation of definite superconducting gap states on the multistage crystal surface of Bi2Sr2CaCu2O8+X

Hironaru Murakami; Ryzo Aoki

doi:10.1117/12.241797

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10 June 1996 LT-STM/STS observation of definite superconducting gap states on the multistage crystal surface of Bi2Sr₂CaCu₂O_8+X

Hironaru Murakami, Ryzo Aoki

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Proceedings Volume 2696, Spectroscopic Studies of Superconductors; (1996) https://doi.org/10.1117/12.241797
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

Low temperature STM/STS observations have been carried out on cleaved BSCCO crystal surfaces. We have succeeded in detection of a special layer, probably a CuO₂ or Ca layer exposed on the surface. The STS spectrum which was reproducibly observed on this special site shows a considerably anisotropic but distinct superconducting gap structure with a definite and flat gap bottom region. This gap structure shows significantly different characteristic from another gap structure observed on the BiO layer, which shows a rounded shape at the gap bottom region without any indication of a finite gap state.

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Hironaru Murakami and Ryzo Aoki "LT-STM/STS observation of definite superconducting gap states on the multistage crystal surface of Bi2Sr₂CaCu₂O_8+X", Proc. SPIE 2696, Spectroscopic Studies of Superconductors, (10 June 1996); https://doi.org/10.1117/12.241797

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