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For a superconductor to be able to receive an external magnetic field, there must be a vacant energy state in the superconductor to receive the energy associated with the field. For a small range of energies near that of the critical…

Superconductivity · Physics 2012-12-04 Ralph C. Dougherty , J. Daniel Kimel

We study thermal entanglement in a two-superconducting-qubit system in two cases, either identical or distinct. By calculating the concurrence of system, we find that the entangled degree of the system is greatly enhanced in the case of…

Quantum Physics · Physics 2011-04-14 Li-Jun Tian , Li-Guo Qin , Hong-Biao Zhang

While it is known that the amplification of the superconducting critical temperature Tc is possible in a system of multiple electronic components in comparison with a single component system, many different road maps for room temperature…

A type I superconductor expels a magnetic field from its interior to a surface layer of thickness $\lambda_L$, the London penetration depth. $\lambda_L$ is a function of temperature, becoming smaller as the temperature decreases. Here we…

Superconductivity · Physics 2021-07-13 J. E. Hirsch

A theory of high temperature superconductivity based on the combination of the fermion-condensation quantum phase transition and the conventional theory of superconductivity is presented. This theory describes maximum values of the…

Strongly Correlated Electrons · Physics 2009-11-07 M. Ya. Amusia , S. A. Artamonov , V. R. Shaginyan

Reasonably good agreement with the superconducting transition temperatures of the cuprate high-Tc superconductors can be obtained on the basis of an approximate phenomenological theory. In this theory, two criteria are used to calculate the…

Superconductivity · Physics 2007-05-23 Mario Rabinowitz , T. McMullenb

Physical explanation of hyperconductivity and thermal superconductivity existence is done in given article on the basis of inherent atomic nuclei oscillations in atoms of materials which are connected with electrons and phonons and in…

Superconductivity · Physics 2008-01-29 V. A. Vdovenkov

The phase diagram and critical properties of the $N$-component London superconductor are studied both analytically and through large-scale Monte-Carlo simulations in $d=2+1$ dimensions (components here refer to different replicas of the…

Superconductivity · Physics 2007-05-23 J. Smiseth , E. Smorgrav , E. Babaev , A. Sudbo

Superconduction manifests when a steady-state current flows through a material without an electric field being present. It is argued here that the absence of scattering of the charge-carriers, although absolutely necessary, is not…

General Physics · Physics 2007-05-23 Johan F. Prins

When a finite superconductor is in contact with a 1D normal conductor, superconducting phase fluctuations lead to power-law response of the normal subsystem. As a result, the charge fluctuations on the superconductor at zero temperature…

Superconductivity · Physics 2009-10-31 Masaki Oshikawa , Alexandre M. Zagoskin

A short review of the history and the contemporary numerical calculations of the operation of an electronic device for generation of electric oscillations by negative differential conductivity of a supercooled below the critical temperature…

Superconductivity · Physics 2020-06-26 Todor M. Mishonov , Aleksander P. Petkov , Victor I. Danchev , Albert M. Varonov

A fundamental question of high-temperature superconductors is the nature of the pseudogap phase which lies between the Mott insulator at zero doping and the Fermi liquid at high doping p. Here we report on the behaviour of charge carriers…

Inspired by recent assertions that imply incorrectness of the classical constitutive relationship of time-varying capacitance, energetic and system-theoretic perspectives are invoked that, instead of incorrectness, show incompleteness of…

Dynamical Systems · Mathematics 2022-10-26 Dimitri Jeltsema

We propose an implementation of a twin paradox scenario in superconducting circuits, with velocities as large as a few percent of the speed of light. Ultrafast modulation of the boundary conditions for the electromagnetic field in a…

In a semiclassical view superconductivity is attributed exclusively to the advance of atoms' outer s electrons through the nuclei of neighbor atoms in a solid. The necessary progression of holes in the opposite direction has the electric…

General Physics · Physics 2013-03-12 Manfred Bucher

On a basis of earlier substantiated expression for effective potential of electron-electron attraction in metals the assumption of an opportunity of formation of classically bound pairs is put forward. It was shown that in distinction from…

Superconductivity · Physics 2007-05-23 I. M. Yurin , V. B. Kalinin

Strongly disordered superconductors in a magnetic field display many characteristic properties of type-II superconductivity--- except at low temperatures where an anomalous linear $T$-dependence of the resistive critical field $B_{c2}$ is…

Superconductivity · Physics 2019-01-16 B. Sacépé , J. Seidemann , F. Gay , K. Davenport , A. Rogachev , M. Ovadia , K. Michaeli , M. V. Feigel'man

The recently proposed theoretical model of superconductors endowed with two distinct superconducting phases and critical temperatures is further analyzed by introducing two distinct order parameters, described by two scalar fields which…

Superconductivity · Physics 2009-11-13 E. Di Grezia , S. Esposito , G. Salesi

In a two-band superconductor, two qualitatively different fluctuation modes related to the gap modules contribute to free energy and heat capacity, in addition to the phase fluctuations. The first mode has divergent temperature behaviour…

Superconductivity · Physics 2015-06-19 Artjom Vargunin , Teet Ord

In the last few years evidence has been accumulating that there are a multiplicity of energy scales which characterize superconductivity in the underdoped cuprates. In contrast to the situation in BCS superconductors, the phase coherence…

Superconductivity · Physics 2007-05-23 K. Levin , Qijin Chen , Ioan Kosztin , Boldizsar Janko , Ying-Jer Kao , Andrew Iyengar