Evidence for superconductivity in Langmuir–Blodgett films of ditetradecyldimethylammonium-Au(dmit)2

The ac complex magnetic susceptibilities, (χ′+iχ″), of conductive Langmuir–Blodgett (LB) films of ditetradecyldimethylammonium-Au(dmit)2 (2C14–Au(dmit)2) have been measured in the temperature range 1.2–4.2 K. A diamagnetic transition of the real part, χ′, and a hump of the imaginary part, χ″, are observed at 3.9 K, indicating the Meissner state. The existence of the superconducting phase is indicated in the LB system below 3.9 K.