Observation of the Meissner effect in the high-Tc (pressure-) phase of the organic superconductor β-(BEDT-TTF)2I3 |
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| Authors: | H Veith C-P Heidmann F Gross A Lerf K Andres D Schweitzer |
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| Institution: | Walther-Meissner-Institut für Tieftemperaturforschung D-8046 Garching, FRG;Max-Planck-Institut für Medizinische Forschung D-6900 Heidelberg, FRG |
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| Abstract: | It is shown that the recently found superconducting state below 6 K in β-(BEDT-TTF)2I3 under a pressure of 1.5 kbar is diamagnetic and exhibits Meissner effects of up to 24 %, indicating that superconductivity is a true volume effect in these crystals. In contrast, no traces of diamagnetism are found in iodine doped α-(BEDT-TTF)2I3, for which resistively observed superconducting transitions in the vicinity of 3 to 5 K have also been reported. |
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