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Force-free current-induced reentrant melting of the vortex lattice in superconductors

Sergey Savel’ev, Ciro Cattuto, Franco Nori

DOI 10.1103/PhysRevB.67.180509 · Physical Review B

T1

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Abstract

When increasing a current j flowing along the vortex lines, we obtain both a gradual shift of the vortex-lattice melting transition (VLMT) to a lower magnetic field and also a rising reentrant melting line, both separating the vortex solid from the vortex-liquid phase. The upper branch of the VLMT merges with the predicted reentrant lower branch at a certain value jmerge of the force-free current. We also derive the entire VLMT diagram in (B,T,j) three-dimensional phase space, and propose possible applications of it—including a magnetic-sensitive current-controlled switch using Bi2Sr2CaCu2O8+δ tapes.

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FormulaReported Tc (K)Pressure (GPa)Type
Bi2Sr2CaCu2O8

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90Pressure not reportedunknown

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