Superconducting transition in disordered granular superconductors in magnetic fields

Ryusuke Ikeda

doi:10.1103/PhysRevB.74.054510

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Superconducting transition in disordered granular superconductors in magnetic fields

Ryusuke Ikeda

DOI 10.1103/PhysRevB.74.054510 · Physical Review B

T1

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Abstract

Motivated by a recent argument that the superconducting (SC) transition field of three-dimensional (3D) disordered superconductors with granular structure in a nonzero magnetic field should lie above Hc2(0) in low T limit, the glass transition [or, in two dimensions (2D), crossover] curve Hg(T) of disordered quantum Josephson junction arrays is examined by incorporating SC fluctuations. It is found that the glass transition or crossover in the granular materials can be described on the same footing as the vortex-glass transition in amorphouslike (i.e., nongranular) materials. In most of 3D granular systems, the vanishing of resistivity on cooling should occur even above Hc2(0), whereas the corresponding sharp drop of the resistivity in the 2D case may appear only below Hc2 as a result of an enhanced quantum fluctuation.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La3Ni2O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
(Y0.8Pr0.2)Ba2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CsV3Sb5-xSnx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown