TY - JOUR
T1 - Inhomogeneous superconductivity in both underdoped and overdoped regimes of high-Tc cuprates
AU - Koike, Y.
AU - Adachi, T.
AU - Tanabe, Y.
AU - Omori, K.
AU - Noji, T.
AU - Sato, H.
PY - 2008/3/1
Y1 - 2008/3/1
N2 - Our recent experimental works on the inhomogeneity of superconductivity in both underdoped and overdoped regimes of La2-xSrxCuO 4 are reviewed. In order to estimate the superconducting (SC) volume fraction in a sample, bulk-sensitive magnetic-susceptibility and specific-heat measurements have been carried out, using La2-xSrxCuO 4 single crystals of good quality with x 0.05-0.3. As a result, it has been found that the SC volume fraction is not 100% in both underdoped and overdoped regimes, suggesting the occurrence of a phase separation into SC and non-SC regions. Moreover, strong vortex-pinning effects have been observed in moderate magnetic fields in the overdoped regime, suggesting that the phase separation in the overdoped regime is not macroscopic but microscopic.
AB - Our recent experimental works on the inhomogeneity of superconductivity in both underdoped and overdoped regimes of La2-xSrxCuO 4 are reviewed. In order to estimate the superconducting (SC) volume fraction in a sample, bulk-sensitive magnetic-susceptibility and specific-heat measurements have been carried out, using La2-xSrxCuO 4 single crystals of good quality with x 0.05-0.3. As a result, it has been found that the SC volume fraction is not 100% in both underdoped and overdoped regimes, suggesting the occurrence of a phase separation into SC and non-SC regions. Moreover, strong vortex-pinning effects have been observed in moderate magnetic fields in the overdoped regime, suggesting that the phase separation in the overdoped regime is not macroscopic but microscopic.
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U2 - 10.1088/1742-6596/108/1/012003
DO - 10.1088/1742-6596/108/1/012003
M3 - Article
AN - SCOPUS:44849134178
VL - 108
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012003
ER -