The equilibrium magnetization for layered superconducting films that experience a nonzero component, H‖, of magnetic field applied parallel to the layers is computed at temperatures and at perpendicular field components in the vicinity of the decoupling transition. A fermion analogy is exploited for this purpose, whereby it is found that the parallel magnetization shows an anomalous H ‖ tail at...

We describe a mechanism to detect quantum phase transition QPT in a system by a coherent probe weakly coupled to it. We illustrate this mechanism by a circuit QED architecture where a superconducting Josephson junction qubit array interacts with a one-dimensional superconducting transmission line resonator TLR . The superconducting qubit array is modeled as an Ising chain in transverse field. O...

We study magneto-transport properties of several amorphous Indium oxide nanowires of different widths. The wires show superconducting transition at zero magnetic field, but, there exist a finite resistance at the lowest temperature. The R(T) broadening was explained by available phase slip models. At low field, and far below the superconducting critical temperature, the wires with diameter equa...

Condensation energy can be thought as the difference in ground state energy between the normal state and the superconducting state in a superconductor. In a way to understand and prove theory for superconducting transition, an accurate measurement of the condensation energy is needed [1]. The most common method for determination of condensation energy is by measuring the thermodynamical critica...

Improving transport current has been the primary topic for practical application of superconducting wires and tapes. However, the porous nature of powder-in-tube (PIT) processed iron-based tapes is one of the important reasons for low critical current density (Jc) values. In this work, the superconducting core density of ex-situ Sr0.6K0.4Fe2As2 + Sn tapes, prepared from optimized precursors, wa...

Selection of any superconducting material for practical applications highly depends upon different critical parameters like critical temperature (Tc), critical current density (Jc) and critical magnetic field (Hc). Different phases of Cu0.5Tl0.5Ba2Can− 1CunO2n+4−δ high temperature superconductor (HTSCs) family can be synthesized at higher pressure of (~5 GPa) as well as at ambient pressure[1]. ...

The magnetic-field-induced decrease of microwave surface impedance, Zs5Rs1 jXs , of superconducting YBa2Cu3O72d thin films is investigated using a microstrip resonator technique. Through measuring Zs as the direct current ~dc! magnetic field is increased from zero to a certain value Hmax and subsequently decreased back to zero, it is found that Zs(Hdc) is totally reversible if Hmax does not exc...

We use cluster Dynamical Mean Field Theory to study the simplest models of correlated electrons, the Hubbard model and the t-J model. We use a plaquette embedded in a medium as a reference frame to compute and interpret the physical properties of these models. We study various observables such as electronic lifetimes, one electron spectra, optical conductivities, superconducting stiffness, and ...