B J Powell and Ross H McKenzie 2004 J. Phys.: Condens. Matter 16 L367 doi:10.1088/0953-8984/16/30/L03
B J Powell and Ross H McKenzie
Show affiliationsWe present an analysis of previously published measurements of the London penetration depth of layered organic superconductors. The predictions of the BCS theory of superconductivity are shown to disagree with the measured zero temperature, in plane, London penetration depth by up to two orders of magnitude. We find that fluctuations in the phase of the superconducting order parameter do not determine the superconducting critical temperature as the critical temperature predicted for a Kosterlitz–Thouless transition is more than an order of magnitude greater than is found experimentally for some materials. This places constraints on theories of superconductivity in these materials.
74.70.Kn Organic superconductors
74.40.+k Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.)
Issue 30 (4 August 2004)
Received 21 April 2004
Published 16 July 2004
B J Powell and Ross H McKenzie 2004 J. Phys.: Condens. Matter 16 L367
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