Anomalous behavior of the second magnetization peak in La1.81Sr0.19CuO4 single crystals: Possible influence of two-band superconductivity

L. Miu; Y. Tanabe; T. Adachi; Y. Koike; D. Miu; G. Jakob; H. Adrian

doi:10.1103/PhysRevB.78.024520

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Anomalous behavior of the second magnetization peak in La1.81Sr0.19CuO4 single crystals: Possible influence of two-band superconductivity

L. Miu, Y. Tanabe, T. Adachi, Y. Koike, D. Miu, G. Jakob, H. Adrian

DOI 10.1103/PhysRevB.78.024520 · Physical Review B

T1

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Abstract

We report an anomalous temperature T variation of the field Hon for the onset of the second magnetization peak in La1.81Sr0.19CuO4 single crystals with the external magnetic field H oriented parallel to the c axis. While the peak field Hp has a continuous decrease with increasing T, Hon exhibits a sudden decrease for T∼11–15 K. This behavior appears to be related to the particular T dependence of the superfluid density in the case of two-band superconductivity affecting the T variation of the elastic energy of the vortex system at low H.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La1.81Sr0.19CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	29	Pressure not reported	onset