We have recently reported the first direct calorimetric observation of a magnetic-field-induced first-order phase transition into a high-field FFLO superconducting state at the Clogston-Chandrasekar ‘Pauli’ paramagnetic limitHp in a 2D superconductor κ − (BEDT-TTF) 2 Cu(NCS) 2 . The high-field state is both higher entropy and strongly paramagnetic, as thermodynamically required for the FFLO sta...

We observe charge-order fluctuations in the quasi-two-dimensional organic superconductor β''-(BEDT-TTF)2SF5CH2CF2SO3, both by means of vibrational spectroscopy, locally probing the fluctuating charge order, and by investigating the in-plane dynamical response by infrared reflectance spectroscopy. The decrease of the effective electronic interaction in an isostructural metal suppresses both char...

We show that Shubnikov-de Haas oscillations in the interlayer resistivity of the organic superconductor beta(")-(BEDT-TTF)2SF5CH2CF2SO3 become very pronounced in magnetic fields approximately 60 T. The conductivity minima exhibit thermally activated behavior that can be explained simply by the presence of a Landau gap, with the quasi-one-dimensional Fermi surface sheets contributing negligibly ...

We have imaged the magnetic fields at the edges of the conducting planes of a single crystal of the layered organic superconductor κ-(BEDTTTF)2Cu(NCS)2. The spatial dependence of these fields agrees well with a Josephson-coupled layer model with some inhomogeneity in the interlayer coupling, providing a direct measurement of the interlayer coupling strength. This coupling is sufficiently weak a...

In the nonmetallic state of the organic superconductor k-~BEDT-TTF)2Cu@N(CN)2#Br synthesized with deuterated BEDT-TTF molecule, an angle-dependent electron spin resonance signal below 6–8 K was found. This is interpreted in terms of an antiferromagnetic resonance. The signal was found only when the sample was rapidly cooled, corresponding to the characteristics in that the present salt stays cl...

2014 We report some results of magnetoresistance, magnetic susceptibility and magnetic anisotropy measurements on single crystals of the two dimensional organic superconductor 03B2L-(BEDT-TTF)2I3 from 4.2 to 300 K. From the c* magnetoresistivity we deduce a value of 0.5 meV for the tight binding transfer integral tc, and show that there is significant conductivity anisotropy (a factor 5) in the...