Observation of anomalous reentrant superconductivity in Sr1−xKxBiO3

D. C. Kim; J. S. Kim; H. R. Kang; G. T. Kim; A. N. Baranov; Y. W. Park; J. S. Pshirkov; E. V. Antipov

doi:10.1103/PhysRevB.64.064502

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Observation of anomalous reentrant superconductivity in Sr1−xKxBiO3

D. C. Kim, J. S. Kim, H. R. Kang, G. T. Kim, A. N. Baranov, Y. W. Park, J. S. Pshirkov, E. V. Antipov

DOI 10.1103/PhysRevB.64.064502 · Physical Review B

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Abstract

We report the observation of a reentrant superconducting-normal resistive transition in Sr1−xKxBiO3 superconductors. In contrast to previously reported reentrant resistive transition behaviors, the reentrant resistivity appearing at zero magnetic field is suppressed to zero by applying an external magnetic field (H) or increasing the electrical transport current (I): an observation of the recovery of a zero resistive superconducting state induced by H or I. An analysis of the normal-state resistivity data indicates the important role that disordered junction barriers between superconducting grains might play on the observed reentrant resistivity behavior. Possible physical origins of this anomalous phenomenon are discussed.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Sr1-xKxBiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	12.5	Pressure not reported	onset
Sr1-xKxBiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	10.1	Pressure not reported	zero_resistance
Sr1-xKxBiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	12.6	Pressure not reported	onset
Sr1-xKxBiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	10.5	Pressure not reported	zero_resistance
Sr1-xKxBiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	12	Pressure not reported	onset
Ba1-xKxBiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown