Low-temperature microwave surface impedance of the conventional organic superconductor kappa -(BEDT-TTF)2Cu(NCS)2.

Uniaxial stress study of the transport properties of the quasi-two-dimensional organic superconductor (BEDT-TTF)2Cu(NCS)2

We report the effects of uniaxial stress applied along the least conducting direction (a-axis) of the organic superconductor ~:-(BEDT-TTF)2Cu(NCS)2. We find that the superconducting transition temperature decreases With stress (dTc/dpa = 2 K/kbar). Furthermore, we find an increase in the area of the closed orbits on the Fermi sbrface with stress. These observations are at variance with predicti...

Superconducting fluctuations and the reduced dimensionality of the organic superconductor k-„BEDT-TTF...2Cu„NCS...2 as observed through measurements of the de Haas–van Alphen effect

We report measurements of the de Haas–van Alphen ~DHVA! effect and ac susceptibility in the layered organic superconductor k-(BEDT-TTF)2Cu(NCS)2.The amplitude of the DHVA oscillations is attenuated over a wide field range above the irreversibility line, B irr(B), below which a rigid flux lattice is formed. Thus the DHVA effect provides a unique probe of the superconducting fluctuations at high ...

Anomalous Behavior of the Thermoelectric Power in the Vicinity of the Superconducting Transition in the Organic Superconductors κ-(BEDT-TTF)2Cu(NCS)2 and κ-(BEDT-TTF)2Cu[ N(CN)2] Br

Trie in-plane thermoelectric power (TEP of trie layered orgamc superconductors ~-(BEDT-TTF)2Cu(NCS)2 and ~-(BEDT-TTF)2Cu[N(CN)2]Br bas been studied in trie vicinity of trie superconducting transition under magnetic field. Below trie transition temperature, an anomalous non-monotonic behavior of trie TEP is found in trie ~-(BEDT-TTF)2Cu(NCS)2 sait: instead of a graduai monotonic decrease, trie T...

Superconducting properties and Fermi-surface topology of the quasi-two-dimensional organic superconductor λ-(BETS)2GaCl4

The Fermi surface topology of the organic superconductor λ(BETS)2GaCl4 has been determined using the Shubnikov-de Haas and magnetic breakdown effects and angle-dependent magnetoresistance oscillations. The former experiments were carried out in pulsed fields of up to 60 T, whereas the latter employed quasistatic fields of up to 30 T. All of these data show that the Fermi-surface topology of λ-(...

Shubnikov-de Haas effect in the quantum vortex liquid state of the organic superconductor κ -(BEDT-TTF)2Cu(NCS)2