Parallel magnetic field suppresses dissipation in superconducting nanostrips

Abstract

The motion of Abrikosov vortices in type-II superconductors results in a finite resistance in the presence of an applied electric current. Elimination or reduction of the resistance via immobilization of vortices is the "holy grail" of superconductivity research. Common wisdom dictates that an increase in the magnetic field escalates the loss of energy since the number of vortices increases. Here we show that this is no longer true if the magnetic field and the current are applied parallel to each other.Our experimental studies on the resistive behavior of a superconducting Mo${}_{0.79}$Ge${}_{0.21}$ nanostrip reveal the emergence of a dissipative state with increasing magnetic field, followed by a pronounced resistance drop, signifying a reentrance to the superconducting state. Large-scale simulations of the 3D time-dependent Ginzburg-Landau model indicate that the intermediate resistive state is due to an unwinding of twisted vortices. When the magnetic field increases, this instability is suppressed due to a better accommodation of the vortex lattice to the pinning configuration. Our findings show that magnetic field and geometrical confinement can suppress the dissipation induced by vortex motion and thus radically improve the performance of superconducting materials.

arXiv comment10 pages, 4 figures

References in corpus (8)

• Realization of Artificial Ice Systems for Magnetic Vortices in a Superconducting MoGe Thin-film with Patterned Nanostructures
• Stable large-scale solver for Ginzburg-Landau equations for superconductors
• Optimization of vortex pinning by nanoparticles using simulations of time-dependent Ginzburg-Landau model
• Onset of Vortices in Thin Superconducting Strips and Wires
• Theory and experiment testing flux-line-cutting physics
• Evaluating free flux flow in low-pinning molybdenum-germanium superconducting films
• Inversion mechanism for the transport current in type-II superconductors
• Material laws and related uncommon phenomena in the electromagnetic response of type-II superconductors in longitudinal geometry

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• Strong in-plane magnetic field induced reemergent superconductivity in the van der Waals heterointerface of NbSe2 and CrCl3
• Edge effect pinning in mesoscopic superconducting strips with non-uniform distribution of defects
• Reversible ratchet effects in a narrow superconducting ring
• Nematic Ising superconductivity with hidden magnetism in few-layer 6R-TaS2
• Time-Dependent Ginzburg-Landau Simulations of Superconducting Vortices in Three Dimensions
• Phase diagram of superconducting vortex ratchet motion in a superlattice with noncentrosymmetry
• Orbital Fulde-Ferrell-Larkin-Ovchinnikov state in 2H-NbS2 flakes
• Ubiquity of rotational symmetry breaking in superconducting films, from Fe(Te,Se)/Bi${}_2$Te${}_3$ to Nb, and the effect of measurement geometry
• Pairing symmetries in the Zeeman-coupled extended attractive Hubbard model