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A magnetic field applied to type-II superconductors introduces quantized vortices that locally quench superconductivity, providing a unique opportunity to investigate electronic orders that may compete with superconductivity. This is…

Superconductivity · Physics 2016-06-01 T. Machida , Y. Kohsaka , K. Matsuoka , K. Iwaya , T. Hanaguri , T. Tamegai

We analyze the vortex dynamics in superconducting thin films with a periodic array of pinning centers. In particular, we study the effect of anisotropy for a Kagom\'e pinning network when longitudinal and transverse transport currents are…

Superconductivity · Physics 2011-12-22 R. P. Simões , P. A. Venegas , D. F. Mello

To understand the anisotropy of flux pinning and critical current density in technological superconductors, the scaling law for the anisotropy of single-vortex collective pinning in uniaxial superconductors is extended to flux-bundle…

Superconductivity · Physics 2016-03-21 Yingxu Li , Guozheng Kang , Yuanwen Gao

We investigate magnetic nano-pillars, in which two thin ferromagnetic nanoparticles are separated by a nanometer thin nonmagnetic spacer and can be set into stable spin vortex-pair configurations. The 16 ground states of the vortex-pair…

Mesoscale and Nanoscale Physics · Physics 2012-09-25 S. S. Cherepov , B. C. Koop , V. Korenivski , D. C. Worledge , A. Yu. Galkin , R. S. Khymyn , B. A. Ivanov

Whether the Anderson localization can survive from the weak enough nonlinear interaction is still an open question. In this Letter, we study the effect of nonlinear interaction on disordered chain based on the wave turbulence theory. It is…

Statistical Mechanics · Physics 2020-10-13 Wang Zhen , Fu Weicheng , Zhang Yong , Zhao Hong

Pinning and thermal creep determine the response of numerous systems containing superstructures, e.g., vortices in type II superconductors, domain walls in ferroics, or dislocations in metals. The combination of drive and thermal…

Superconductivity · Physics 2018-09-19 Martin Buchacek , Roland Willa , Vadim B. Geshkenbein , Gianni Blatter

Topological magnetic textures are of great interest in various scientific and technological fields. To allow for precise control of nanoscale magnetism, it is of great importance to understand the role of intrinsic defects in the host…

Mesoscale and Nanoscale Physics · Physics 2021-07-22 Marcel Möller , John H. Gaida , Claus Ropers

Symmetry elegantly governs the fundamental properties and derived functionalities of condensed matter. For instance, realizing the superconducting diode effect (SDE) demands breaking space-inversion and time-reversal symmetries…

Using time-dependent density functional theory, we study how density and size of impurities govern dissipation of persistent currents of fermionic superfluid rings in the BCS regime. The critical winding number for vortex emission increases…

The charging effect of a superconducting vortex core is very important for transport properties of superconducting vortices. The chiral p-wave superconductor, known as a topological superconductor (SC), has a Majorana fermion in a vortex…

Superconductivity · Physics 2018-05-09 Yusuke Masaki , Yusuke Kato

Within the Ginzburg-Landau theory we consider Abrikosov vortex pinning on a columnar defect with the characteristic size of the cross-section much smaller than the coherence length. We present an extension of the electrostatic analogies…

Superconductivity · Physics 2012-08-24 A. A. Bespalov , A. S. Mel'nikov

We use local and global magnetometry measurements to study the influence of magnetic domain width w on the domain-induced vortex pinning in superconducting/ferromagnetic bilayers, built of a Nb film and a ferromagnetic Co/Pt multilayer with…

Superconductivity · Physics 2015-05-28 Marta Z. Cieplak , L. Y. Zhu , Z. Adamus , M. Konczykowski , C. L. Chien

We discuss the weak-coupling BCS theory of a superconductor with the impurities, accounting for their anisotropic momentum-dependent potential. The impurity scattering process is considered in the t-matrix approximation and its influence on…

Superconductivity · Physics 2009-10-31 G. Haran , A. D. S. Nagi

We examine multi and individual vortex pinning in thin superconductors with periodic pinning arrays. For multi-vortex pinning we observe peaks in the critical current of equal magnitude at every matching field, while for individual vortex…

Superconductivity · Physics 2009-11-07 C. Reichhardt , G. T. Zimanyi , R. T. Scalettar , A. Hoffmann , Ivan K. Schuller

The Langevin equation for a two-dimensional (2D) nonlinear guided vortex motion in a tilted cosine pinning potential in the presence of an ac is exactly solved in terms of a matrix continued fraction at arbitrary value of the Hall effect.…

Superconductivity · Physics 2010-06-17 Valerij A. Shklovskij , Oleksandr V. Dobrovolskiy

Two-dimensional vortex dynamics in a ratchet washboard planar pinning potential (PPP) in the presence of thermal fluctuations is considered on the basis of a Fokker-Planck equation. Explicit expressions for two new nonlinear anisotropic…

Superconductivity · Physics 2010-06-16 Valerij A. Shklovskij , Vladimir V. Sosedkin

A unified model of vortex tangles is proposed to describe unconventional transport in cuprate high-temperature superconductors, which not only captures the fast vortices scenario at low density, but also predicts a novel mechanism of…

Superconductivity · Physics 2017-06-02 Rong Li , Zhen-Su She

We present an efficient and general method to compute vortex-pinning interactions - which arise in neutron stars, superconductors, and trapped cold atoms - at arbitrary separations using real-time dynamics. This method overcomes…

Nuclear Theory · Physics 2013-11-15 Aurel Bulgac , Michael McNeil Forbes , Rishi Sharma

We study impurity effects in vortex core of two-dimensional moderately clean su perconductors within the quasiclassical theory. The impurity scattering rate $\G amma(E)$ of the Andreev bound states in vortex core with +1 vorticity of p-wav…

Superconductivity · Physics 2009-10-31 Yusuke Kato

We study theoretically the vortex matter structure in low dimensional (LD) systems with superconducting order induced by proximity to a bulk superconductor. We analyze the effects of microscopic coupling mechanisms between the two systems…

Superconductivity · Physics 2019-04-15 N. B. Kopnin , I. M. Khaymovich , A. S. Mel'nikov
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