We present a microscopic approach to the calculations of thermal conductivity in unconventional superconductors for a wide range of temperatures and magnetic fields. Our work employs the nonequilibrium Keldysh formulation of the quasiclassical theory. We solve the transport equations using a variation of the BrandtPesch-Tewordt method that accounts for the quasiparticle scattering on vortices. ...

2014 The specific heat of the organic superconductor (TMTSF)2ClO4 has been measured between 0.4 and 2 K. A large anomaly of the electronic contribution at 1.22 K has been attributed to the onset of three-dimensional superconducting order. There is a large magnetic field dependence of the electronic contribution above 1.22 K which is not characteristic of a normal conducting state. The applicati...

Whereas the static spin-susceptibility x5(T) of b and at-(BEDT-TTF)& at 5.7 tesla increases in a slow monotonic manner with temperature, xS(T) for the organic superconductor (BEDT-TTF)$Zu(SCN)2 displays a markedly structured temperature dependence. This gives evidence for two or more phase transitions in the metallic phase at temperatures near 100 K and 50 K, in addition to the onset of superco...

The competition between antiferromagnetism and the d+ id superconducting state is studied in a model with near and next near neighbour interactions in the absence of any on-site repulsion. A mean field study shows that it is possible to have simultaneous occurrence of an antiferromagnetic and a singlet d + id superconducting state in this model. In addition, such a coexistence generates a tripl...

We report detailed measurements of the interlayer magnetoresistance of the layered organic superconductor k –(BEDT-TTF)2Cu(SCN)2 for temperatures down to 0.5 K and fields up to 30 T. The upper critical field is determined from the resistive transition for a wide range of temperatures and field directions. For magnetic fields parallel to the layers, the upper critical field increases approximate...

superconductor fault current limiter (sfcl) is an effective device to suppress high fault currents. this paper presents a comparative study of resistive and inductive fault current limiters from transient stability point of view.  appropriate location and type of the limiters in a hv substation is selected by a qualitative approach based on the equal area criterion. study system is simulated by...

Electronic evolution from an antiferromagnetic insulator to a high-Tc superconductor is revealed by angle-resolved photoemission spectroscopy experiments on tetragonal Ca2 xNaxCuO2Cl2 single crystals, which were grown for the first time under high pressures (6 5.5 GPa). In an underdoped superconductor (x 1⁄4 0:1), we found clear fingerprints of the parent magnetic insulator: a shadow band and a...

Superconductor films on semiconductor substrates have drawn much attention recently since the derived superconductor-based electronics have been shown to be promising for future data processing and storage technologies. By growing atomically uniform single-crystal epitaxial Pb films of several nanometers thick on Si wafers to form a sharp superconductor-semiconductor heterojunction, we have obt...

We describe experimental signatures of Majorana fermion edge states, which form at the interface between a superconductor and the surface of a topological insulator. If a lead couples to the Majorana fermions through electron tunneling, the Majorana fermions induce resonant Andreev reflections from the lead to the grounded superconductor. The linear tunneling conductance is 0 (2e(2)/h) if there...

Using state-of-the-art analytic techniques for extracting a singularity from a complex field, we can visualize the vortices in the largest time-dependent Ginsburg Landau simulation of a superconductor performed to date. Our visualization reveals the internal dynamics of the vortices in the superconductor, explaining the cause of a voltage spike in the electro-magnetic response of the system. Th...