Magnetoresistance oscillations in superconducting strips: A Ginzburg-Landau study

G. R. Berdiyorov; X. H. Chao; F. M. Peeters; H. B. Wang; V. V. Moshchalkov; B. Y. Zhu

doi:10.1103/PhysRevB.86.224504

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Magnetoresistance oscillations in superconducting strips: A Ginzburg-Landau study

G. R. Berdiyorov, X. H. Chao, F. M. Peeters, H. B. Wang, V. V. Moshchalkov, B. Y. Zhu

DOI 10.1103/PhysRevB.86.224504 · Physical Review B

T1

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Abstract

Within the time-dependent Ginzburg-Landau theory we study the dynamic properties of current-carrying superconducting strips in the presence of a perpendicular magnetic field. We found pronounced voltage peaks as a function of the magnetic field, the amplitude of which depends both on sample dimensions and external parameters. These voltage oscillations are a consequence of moving vortices, which undergo alternating static and dynamic phases. At higher fields or for high currents, the continuous motion of vortices is responsible for the monotonic background on which the resistance oscillations due to the entry of additional vortices are superimposed. Mechanisms for such vortex-assisted resistance oscillations are discussed. Qualitative changes in the magnetoresistance curves are observed in the presence of random defects, which affect the dynamics of vortices in the system.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown