Grain boundaries as weak links: The case of (formula presented) with reference to (formula presented)

S. B. Samanta; H. Narayan; A. Gupta; A. V. Narlikar; T. Muranaka; Jun Akimitsu

doi:10.1103/PhysRevB.65.092510

Grain boundaries as weak links: The case of (formula presented) with reference to (formula presented)

S. B. Samanta, H. Narayan, A. Gupta, A. V. Narlikar, T. Muranaka, Jun Akimitsu

Research output: Contribution to journal › Article › peer-review

Abstract

The grain boundaries (GB’s) in the intermetallic superconductor (formula presented) interestingly, do not show suppression of supercurrent density. This unexpected behavior has been investigated by a scanning tunneling microscopy/spectroscopy technique at atomic resolution. The GB in (formula presented) is seen as an amorphous region extending from 50 to 200 Å and has a metallic character. This observation supports proximity coupling between the grains, which explains why supercurrent density does not degrade in this material. The results for another intermetallic superconductor (formula presented) having GB’s (average width 30 Å) that are quasi-insulating in nature have also been presented and compared with the former.

Original language	English
Pages (from-to)	1-3
Number of pages	3
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	65
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.65.092510
Publication status	Published - Jan 1 2002
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Grain boundaries as weak links: The case of (formula presented) with reference to (formula presented)",

abstract = "The grain boundaries (GB{\textquoteright}s) in the intermetallic superconductor (formula presented) interestingly, do not show suppression of supercurrent density. This unexpected behavior has been investigated by a scanning tunneling microscopy/spectroscopy technique at atomic resolution. The GB in (formula presented) is seen as an amorphous region extending from 50 to 200 {\AA} and has a metallic character. This observation supports proximity coupling between the grains, which explains why supercurrent density does not degrade in this material. The results for another intermetallic superconductor (formula presented) having GB{\textquoteright}s (average width 30 {\AA}) that are quasi-insulating in nature have also been presented and compared with the former.",

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AU - Samanta, S. B.

AU - Narayan, H.

AU - Gupta, A.

AU - Narlikar, A. V.

AU - Muranaka, T.

AU - Akimitsu, Jun

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