Inhomogeneity of superconductivity and stripe correlations at x ∼ 0.21 in La2-xSrxCuO4

M. Miyazaki, T. Adachi, Y. Tanabe, H. Sato, T. Nishizaki, K. Kudo, T. Sasaki, N. Kobayashi, Y. Koike

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With the aim at investigating the relationship between the anomalous decrease in Tc, the development of the Cu-spin correlation and the inhomogeneity of superconductivity at x ∼ 0.21 in the overdoped regime of La2-xSrxCuO4, we have performed the in-plane electrical-resistivity, ρab and magnetization measurements. Measurements of the temperature dependence of ρab in magnetic fields have revealed that the superconducting (SC) transition curve shifts to the low-temperature side almost in parallel with increasing field above ∼ 9 T at x ∼ 0.21, which is similar to that observed for stripe-ordered La-214 systems with the hole concentration of ∼ 1/8 per Cu. On the other hand, it has been found that the magnetization curve shows the so-called second peak in the SC state at x ∼ 0.21, which is due to the strong vortex pinning in normal-state regions in the nano-scale inhomogeneous SC state. Accordingly, it is likely that the stripe correlations are developed in the nano-scale inhomogeneous SC state at x ∼ 0.21.

Original languageEnglish
Article number022074
JournalJournal of Physics: Conference Series
Issue numberPART 2
Publication statusPublished - 2012
Event26th International Conference on Low Temperature Physics, LT 2011 - Beijing, China
Duration: 2011 Aug 102011 Aug 17


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