Following a short discussion of the granular model for an inhomogeneous superconductor, we review the Uemura and Homes correlations and show how both follow in two limits of a simple granular superconductor model. Definite expressions are given for the almost universal coefficients appearing in these relationships in terms of known constants.

The integer quantum Hall effect with a superconducting contact is analyzed. It is shown that the conductance plateaus occur at σxy = 2ne /h which is double the usual value. Non-Andreev scattering at the interface and flux penetration into the superconductor are shown to not affect the result. The effect should be observable in InAs quantum wells with Nb a contact. Typeset using REVTEX 1 This pa...

(BEDT-TTF)4Hg2.89Br8 (BEDT-TTF ) bisethylene dithiotetrathiofulvalene) is an ambient pressure low-temperature superconductor (Tc ) 4.3K) with an incommensurate two-sublattice structure. It crystallizes in orthorhombic and monoclinic modifications. Only the monoclinic phase becomes superconducting on cooling, as confirmed in this study. Its Hg sublattice undergoes a transition when the temperatu...

We consider theoretically a Josephson junction with a superconducting critical current density which has a random sign along the junction's surface. We show that the ground state of the junction corresponds to the phase difference equal to π 2. Such a situation can take place in superconductor-ferromagnet-superconductor junctions.

of Superconductor-Isolator-Superconductor Mixers and Its Effect on Mixing Performance Wenlei SHAN, Mingjye WANG, Shengcai SHI, Yoshihisa IRIMAJIRI and Takeshi NOGUCHI Nobeyama Radio Observatory, National Astronomical Observatory of Japan, Nobeyama, Nagano 384-1305, Japan Purple Mountain Observatory, National Astronomical Observatories of China, Nanjing 210008, China Institute of Astronomy and A...

A serious obstacle impeding the application of lowand hightemperature superconductor devices is the presence of trapped magnetic flux: flux lines or vortices can be induced by fields as small as the Earth’s magnetic field. Once present, vortices dissipate energy and generate internal noise, limiting the operation of numerous superconducting devices. Methods used to overcome this difficulty incl...

Quasi-two-dimensional crystalline organic metals and superconductors are very flexible systems in the study of many-body effects and unusual mechanisms for superconductivity [1, 2, 3, 4, 5, 6, 7]. Their “soft” lattices enable one to use relatively low pressures to tune the same material through a variety of low-temperature groundstates, for example from Mott insulator via intermingled antiferro...