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The possibility of surface enhancement of superconductivity is examined experimentally. It is shown that single crystal tin samples with cold-worked surfaces represent a superconductor with a surface-enhanced order parameter (or negative…

Superconductivity · Physics 2009-11-11 V. F. Kozhevnikov , M. J. Van Bael , W. Vinckx , K. Temst , C. Van Haesendonck , J. O. Indekeu

Superconductivity in the simple elements is of both technological relevance and fundamental scientific interest in the investigation of superconductivity phenomena. Recent advances in the instrumentation of physics under pressure have…

Superconductivity · Physics 2009-11-10 Cristina Buzea , Kevin Robbie

We develop an analytical theory for quantum phase transitions driven by disorder in magnets and superconductors. We study these transitions with a cavity approximation which becomes exact on a Bethe lattice with large branching number. We…

Superconductivity · Physics 2015-05-14 Lev Ioffe , Marc Mezard

The authors of a recent Letter [Phys. Rev. Lett. 97, 137001 (2006)] observed enhancement of the critical supercurrent of superconducting nanowires in external magnetic field. They attributed the obtained behavior to the presence of magnetic…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Maxim Yu. Kharitonov , Mikhail V. Feigel'man

A theory of phonon-mediated superconductivity in strong-coupling amorphous materials is developed based on an effective description of structural disorder and its effect on the vibrational spectrum. The theory accounts for the…

Superconductivity · Physics 2020-06-05 Matteo Baggioli , Chandan Setty , Alessio Zaccone

Several experimental studies have shown the presence of spatially inhomogeneous phase coexistence of superconducting and non superconducting domains in low dimensional organic superconductors. The superconducting properties of these systems…

Superconductivity · Physics 2015-05-30 Sonia Haddad , Samia Charfi-Kaddour , Jean-Paul Pouget

We develop a theory of a pseudogap state appearing near the superconductor-insulator transition in strongly disordered metals with attractive interaction. We show that such an interaction combined with the fractal nature of the single…

Superconductivity · Physics 2007-05-23 Michael V. Feigel'man , Lev B. Ioffe , Emil A. Yuzbashyan

We use exact diagonalization techniques to study the interplay between strong correlations, superconductivity, and disorder in a model system. We study an extension of the t-J model by adding an infinite-range d-wave superconductivity…

Strongly Correlated Electrons · Physics 2009-02-06 Marcos Rigol , B. Sriram Shastry , Stephan Haas

We reveal the intricate impact of nonlinearity and disorder on the thermal conductivity of acoustic chains. Disorder induces mobility edges and allows to control the amount of extended modes which are the ballistic channels for energy…

Disordered Systems and Neural Networks · Physics 2010-09-20 M. V. Ivanchenko , S. Flach

On the basis of the recently proposed self-consistent theory of metal- insulator transition in strongly disordered systems, taking into account interaction effects, we study transition temperature $T_{c}$ suppression in disordered…

Superconductivity · Physics 2009-10-28 E. Z. Kuchinskii , M. V. Sadovskii , M. A. Erkabaev

We investigate the influence of weak disorder on the fluctuation driven first order transition found in a p-wave superconductor. The flow equations for the disorder averaged effective theory is derived in an $4-\epsilon$ expansion. The…

Superconductivity · Physics 2009-03-03 Priyanka Mohan , R. Narayanan

A perturbation theory and a diagram technique for a disordered metal are proposed when scattering of quasiparticles by nonmagnetic impurities is caused with a retarded interaction. The perturbation theory generalizes a case of the elastic…

Superconductivity · Physics 2014-01-13 K. V. Grigorishin

The comprehensive research of the electronic structure, thermodynamic and electrical transport properties reveals the existence of inhomogeneous superconductivity due to structural disorder in Ca$_3$Rh$_4$Sn$_{13}$ doped with La…

Superconductivity · Physics 2024-10-01 A. Slebarski , P. Zajdel , M. Fijalkowski , M. M. Maska , P. Witas , J. Goraus , Y. Fang , D. C. Arnold , M. B. Maple

The experimental observation of superconductivity in LaFeAsO appearing on doping is analyzed with the group-theoretical approach that evidently led in a foregoing paper (J. Supercond 24:2103, 2011) to an understanding of the cause of both…

Superconductivity · Physics 2021-06-08 Ekkehard Krüger , Horst P. Strunk

Semiconductivity and superconductivity are remarkable quantum phenomena that have immense impact on science and technology, and materials that can be tuned, usually by pressure or doping, to host both types of quantum states are of great…

Materials Science · Physics 2021-10-27 Chang Liu , Xianqi Song , Quan Li , Yanming Ma , Changfeng Chen

The article suggests an experiment enabling to find the right theory of superconductivity.

Superconductivity · Physics 2014-03-21 I. M. Yurin

We investigate effects of disorder on the density of states, the single particle response function and optical conductivity in multiband superconductors with s_{+-} symmetry of the order parameter, where s_{+-} -> s_{++} transition may take…

Superconductivity · Physics 2013-01-07 D. V. Efremov , A. A. Golubov , O. V. Dolgov

This paper has been submitted to Science. It summarizes the experimental evidence for (and against) the interlayer theory. It was delayed in posting by clerical error.

Condensed Matter · Physics 2007-05-23 Philip W. Anderson

We reply to the recent comment cond-mat/9810097 on our original Letter `Roughening Transition of Interfaces in Disordered Systems', Phys. Rev. Lett. 81, 1469 (1998).

Statistical Mechanics · Physics 2007-05-23 Thorsten Emig , Thomas Nattermann

Unconventional superconductivity is generally expected to be strongly suppressed by nonmagnetic disorder, as captured by Abrikosov--Gor'kov (AG) theory. However, several materials, including transition metal dichalcogenides, exhibit…

Superconductivity · Physics 2026-04-14 Yuval Tsur , Mark H. Fischer , Jonathan Ruhman
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