Critical magnetic fields of β-(BEDT-TTF)2I3 in the high-temperature superconducting phase
Bulaevskii L. N. , Ginodman V. B. , Gudenko A. V.
The dependence Hcl (T) has been studied in the/?~# high-temperature superconducting phase of/?-(ET)2I3. The Hc2 (T) curve has a pronounced positive curvature. This behavior implies that a non-BCS version of superconductivity, e.g., a strong-coupling superconductivity, may occur in the/?-H phase.