Inhomogeneous superconducting state in the overdoped regime of La2-xSrxCuO4: Comparison with the superconducting state of NbSe2

Y. Tanabe; T. Adachi; K. Omori; H. Sato; T. Noji; T. Sasaki; N. Kobayashi; Y. Koike

doi:10.1016/j.jpcs.2008.06.094

Inhomogeneous superconducting state in the overdoped regime of La_2-xSr_xCuO₄: Comparison with the superconducting state of NbSe₂

Y. Tanabe, T. Adachi, K. Omori, H. Sato, T. Noji, T. Sasaki, N. Kobayashi, Y. Koike

Research output: Contribution to journal › Article

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Abstract

We have measured the temperature dependence of the magnetic susceptibility, χ vs. T, and the magnetization curve, M vs. H, for NbSe₂ single crystals, in order to compare the superconducting (SC) state in the overdoped regime of La_2-xSr_xCuO₄ (LSCO) with the SC state of the layered conventional superconductor NbSe₂. While a plateau in χ vs. T in a moderate magnetic field and a so-called second peak in M vs. H, which is due to the marked enhancement of vortex pinning, have been observed in the overdoped regime of LSCO, these behaviors have not been observed in NbSe₂. The present results indicate that the anomalously marked enhancement of vortex pinning is a characteristic feature in the overdoped LSCO where a microscopic phase separation into SC and normal-state regions takes place.

Original language	English
Pages (from-to)	3217-3220
Number of pages	4
Journal	Journal of Physics and Chemistry of Solids
Volume	69
Issue number	12
DOIs	https://doi.org/10.1016/j.jpcs.2008.06.094
Publication status	Published - 2008 Dec 1

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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Tanabe, Y., Adachi, T., Omori, K., Sato, H., Noji, T., Sasaki, T., Kobayashi, N., & Koike, Y. (2008). Inhomogeneous superconducting state in the overdoped regime of La_2-xSr_xCuO₄: Comparison with the superconducting state of NbSe₂. Journal of Physics and Chemistry of Solids, 69(12), 3217-3220. https://doi.org/10.1016/j.jpcs.2008.06.094

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title = "Inhomogeneous superconducting state in the overdoped regime of La2-xSrxCuO4: Comparison with the superconducting state of NbSe2",

abstract = "We have measured the temperature dependence of the magnetic susceptibility, χ vs. T, and the magnetization curve, M vs. H, for NbSe2 single crystals, in order to compare the superconducting (SC) state in the overdoped regime of La2-xSrxCuO4 (LSCO) with the SC state of the layered conventional superconductor NbSe2. While a plateau in χ vs. T in a moderate magnetic field and a so-called second peak in M vs. H, which is due to the marked enhancement of vortex pinning, have been observed in the overdoped regime of LSCO, these behaviors have not been observed in NbSe2. The present results indicate that the anomalously marked enhancement of vortex pinning is a characteristic feature in the overdoped LSCO where a microscopic phase separation into SC and normal-state regions takes place.",

author = "Y. Tanabe and T. Adachi and K. Omori and H. Sato and T. Noji and T. Sasaki and N. Kobayashi and Y. Koike",

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T1 - Inhomogeneous superconducting state in the overdoped regime of La2-xSrxCuO4

T2 - Comparison with the superconducting state of NbSe2

AU - Tanabe, Y.

AU - Adachi, T.

AU - Omori, K.

AU - Sato, H.

AU - Noji, T.

AU - Sasaki, T.

AU - Kobayashi, N.

AU - Koike, Y.

PY - 2008/12/1

Y1 - 2008/12/1

N2 - We have measured the temperature dependence of the magnetic susceptibility, χ vs. T, and the magnetization curve, M vs. H, for NbSe2 single crystals, in order to compare the superconducting (SC) state in the overdoped regime of La2-xSrxCuO4 (LSCO) with the SC state of the layered conventional superconductor NbSe2. While a plateau in χ vs. T in a moderate magnetic field and a so-called second peak in M vs. H, which is due to the marked enhancement of vortex pinning, have been observed in the overdoped regime of LSCO, these behaviors have not been observed in NbSe2. The present results indicate that the anomalously marked enhancement of vortex pinning is a characteristic feature in the overdoped LSCO where a microscopic phase separation into SC and normal-state regions takes place.

AB - We have measured the temperature dependence of the magnetic susceptibility, χ vs. T, and the magnetization curve, M vs. H, for NbSe2 single crystals, in order to compare the superconducting (SC) state in the overdoped regime of La2-xSrxCuO4 (LSCO) with the SC state of the layered conventional superconductor NbSe2. While a plateau in χ vs. T in a moderate magnetic field and a so-called second peak in M vs. H, which is due to the marked enhancement of vortex pinning, have been observed in the overdoped regime of LSCO, these behaviors have not been observed in NbSe2. The present results indicate that the anomalously marked enhancement of vortex pinning is a characteristic feature in the overdoped LSCO where a microscopic phase separation into SC and normal-state regions takes place.

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