Vortex Dynamics in a Superconducting Film with a Kagome and a Honeycomb Pinning Landscape

Cuppens, J.; Ataklti, G. W.; Gillijns, Werner; Vondel, J. Van de; Moshchalkov, Victor; Silhanek, Alejandro

doi:10.1007/s10948-010-0893-7

Cited by 16 publications

(19 citation statements)

References 17 publications

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“…It has been recognized that vortex traps arranged in complex units cells, such as honeycomb or kagome patterns [27,28], exhibit some properties unique to them. Indeed, (i) molecular dynamics simulations have revealed cooperative ring elementary excitations in a kagome periodic array of pinning sites when the temperature is varied slowly [29], (ii) commensurate pinning enhancement takes place at magnetic fields H/H 1 = n/2 (honeycomb) and H/H 1 = n/3 (kagome) rather than at the standard fields H/H 1 = n [30], (iii) stronger enhancement of the depinning current is observed compared * xuecun@nwpu.edu.cn † junyi.ge@fys.kuleuven.be ‡ joris.vandevondel@kuleuven.be to a triangular lattice [30], (iv) spontaneous transverse voltage and jamming effect in a honeycomb array are generated by the dimerization of interstitial vortices [31], and (v) vortex interaction enhanced saturation number and caging effect can be observed [32].…”

Section: Introductionmentioning

confidence: 99%

Mapping degenerate vortex states in a kagome lattice of elongated antidots via scanning Hall probe microscopy

Xue

et al. 2017

Phys. Rev. B

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We investigate the degeneracy of the superconducting vortex matter ground state by directly visualizing the vortex configurations in a kagome lattice of elongated antidots via scanning Hall probe microscopy. The observed vortex patterns, at specific applied magnetic fields, are in good agreement with the configurations obtained using time-dependent Ginzburg-Landau simulations. Both results indicate that the long-range interaction in this nanostructured superconductor is unable to lift the degeneracy between different vortex states and the pattern formation is mainly ruled by the nearest-neighbor interaction. This simplification makes it possible to identify a set of simple rules characterizing the vortex configurations. We demonstrate that these rules can explain both the observed vortex distributions and the magnetic-field-dependent degree of degeneracy.

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Section: Introductionmentioning

confidence: 99%

Mapping degenerate vortex states in a kagome lattice of elongated antidots via scanning Hall probe microscopy

Xue

et al. 2017

Phys. Rev. B

Self Cite

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“…For example, extensive molecular dynamics simulations have been conducted in recent years 21 , which revealed remarkable variety of static and dynamic phenomena at integer and noninteger fillings. Experimental studies have also been performed recently, showing unusual features of such superconducting systems such as guided vortex motion [25][26][27][28] . In combination with computer simulations, we reveal that interstitial vortices appear once the saturation number n si predicted for an isolated defect is exceeded.…”

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confidence: 99%

Vortex interaction enhanced saturation number and caging effect in a superconducting film with a honeycomb array of nanoscale holes

et al. 2012

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“…Over the last few decades, various properties of superconducting thin films with an array of artificial pinning centers have been explored [1][2][3][4][5]. Different geometrical structures [2,3,[5][6][7][8][9][10] have been used in the composition of the array of dots or antidots. Previous works [10] showed that using a diluted array of antidots increases pinning effect along with energy conservation.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Critical Currents for a Diluted Square Lattice Using Artificial Neural Networks

et al. 2017

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Studying critical currents, critical temperatures, and critical fields carries substantial importance in the field of superconductivity. In this work, we study critical currents in the current-voltage characteristics of a diluted-square lattice on an Nb film. Our measurements are based on a commercially available Physical Properties Measurement System, which may prove time consuming and costly for repeated measurements for a wide range of parameters. We therefore propose a technique based on artificial neural networks to facilitate extrapolation of these curves for unforeseen values of temperature and magnetic fields. We demonstrate that our proposed algorithm predicts the curves with an immaculate precision and minimal overhead, which may as well be adopted for prediction in other types of regular and diluted lattices. In addition, we present a detailed comparison between three artificial neural networks architectures with respect to their prediction efficiency, computation time, and number of iterations to converge to an optimal solution.

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Vortex Dynamics in a Superconducting Film with a Kagome and a Honeycomb Pinning Landscape

Cited by 16 publications

References 17 publications

Mapping degenerate vortex states in a kagome lattice of elongated antidots via scanning Hall probe microscopy

Mapping degenerate vortex states in a kagome lattice of elongated antidots via scanning Hall probe microscopy

Vortex interaction enhanced saturation number and caging effect in a superconducting film with a honeycomb array of nanoscale holes

Prediction of Critical Currents for a Diluted Square Lattice Using Artificial Neural Networks

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