NDLI: Resistive transition in an extremely two-dinff-nsional superconductor, /spl alpha/-(BEDT-TTF)/sub 2/NH/sub 4/Hg(SCN)/sub 4/

Content Provider	IEEE Xplore Digital Library
Author	Sato, H. Nakazawa, Y. Kawamoto, A. Kato, K. Kanoda, K.
Copyright Year	1994
Description	Author affiliation: Ochanomizu University (Sato, H.)
Abstract	Summary form only given. Among many BEDT-TTF based superconductors, the titled compound is unique due to highly two-dimensional nature of the electronic state. In the present work, the superconductivity of this compound has been investigated by in-plane and out-of-plane resistive measurements down to 0.5 K. The transition at a zero field is characterized by an onset of decrease of resistivity around 2.3 K and gradual decrease at lower temperatures, followed by an appearence of zero-resistance state around 0.9 K. This characteristics were reproduced for several samples measured, impking that the broadeness of the transition is intrinsic, not due to inhomogeneity in a crystal. The transition to a zero resistance was very sensitive to the field perpendicular to the layer although the 2.3-K-transition was insensitive to the field. The two-dimensionality and broad transition observed in this compound lead us to speculate on free vortex-antivortex excitation below the mean-field transition, inherent in two-dimensional superconductivity. We report further characterization of the superconductivity such as anisotropy, temperature and field dependence of resistivity, current-voltage characteristics. The possibility of the Kosteritz-Thouless transition in this compound is discussed.
Starting Page	171
Ending Page	171
File Size	83127
Page Count	1
File Format	PDF
DOI	10.1109/STSM.1994.834958
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-07-24
Publisher Place	Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Performance evaluation Superconducting materials Thermodynamics Magnetic field measurement Phase measurement Superconductivity Conductivity Physics Superconducting transition temperature Magnetic susceptibility
Content Type	Text
Resource Type	Article

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