Possible non-resonant rf absorption evidence for superconducting fluctuations above T-c in Bi2Sr2CaCu2O8 single crystals

Sudershan, YS and Rastogi, Amit and Bhat, SV and Grover, AK and Yamaguchi, Y and Oka, K and Nishihara, Y (1998) Possible non-resonant rf absorption evidence for superconducting fluctuations above T-c in Bi2Sr2CaCu2O8 single crystals. In: Solid State Communications, 107 (07). pp. 373-378.

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Abstract

The magnetic field dependent r.f. (20 MHz) power dissipation, P(H) vs H, for H-r.f. \\ c \\ H in Bi2Sr2CaCu2O8 (Bi 2 2 1 2) Single crystals shows an onset at T similar to 102 K, nearly 20 K above the nominal T-C (similar to 82 K). In contrast, for H-r.f. \\ ab, H \\ c, the onset of losses occurs at the T-C. One possible reason for the onset at similar to 102 K could be the Bi2Sr2Ca2Cu3O8 (Bi 2 2 2 3) inclusions with a T-C similar to 100-110 K. However, our non-resonant r.f. absorption studies cast doubt on this conclusion and point towards an alternative explanation in terms of superconducting fluctuations above the T-C of Bi 2 2 1 2 single crystals. Support for this is provided by the characteristic temperature dependence of the magnetic field dependent r.f. dissipation.

Item Type:	Journal Article
Publication:	Solid State Communications
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	high-TC superconductors;electron-electron interactions.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	21 Dec 2009 11:33
Last Modified:	19 Sep 2010 05:26
URI:	http://eprints.iisc.ac.in/id/eprint/19081

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