Magnetic flux rotation anomalies in superconducting La1.85Sr0.15CuO4

Y. Bruckental; A. Shaulov; Y. Yeshurun

doi:10.1103/PhysRevB.77.064512

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Magnetic flux rotation anomalies in superconducting La1.85Sr0.15CuO4

Y. Bruckental, A. Shaulov, Y. Yeshurun

DOI 10.1103/PhysRevB.77.064512 · Physical Review B

T1

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Abstract

Vector magnetization measurements in La1.85Sr0.15CuO4 under fields slightly tilted from the crystallographic ab plane reveal flux rotation with distinctive behavior around T*≈15K. The temperature dependence of the onset-field H* for flux rotation and the dependence of H* upon the tilting angle are markedly different below and above T*, exhibiting pronounced anomalies in the crossover regime. Possible mechanisms for these anomalies, such as dimensional crossover in superconductivity or the anomalous behavior of the in-plane penetration depth due to coexistence of two superconducting gaps, are discussed.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	37	Pressure not reported	unknown
YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La1.83Sr0.17CuO4 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