Magnetic-Susceptibility and Specific-Heat Studies on the Inhomogeneity of Superconductivity in the Underdoped La2-xSrxCuO4
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概要
- 論文の詳細を見る
The possible inhomogeneity of superconductivity has been investigated by means of bulk-sensitive probes, using La2-xSrxCuO4 (LSCO) single crystals from the underdoped to optimally doped regime. Measurements of the magnetic susceptibility, $\chi$, on field cooling and specific heat have revealed that both the absolute value of $\chi$ at 2 K, regarded as corresponding to the superconducting (SC) volume fraction in a sample, and the Sommerfeld constant, reflecting the density of states of quasiparticles at the Fermi level, exhibit significant dependence on $x$, namely, on the hole concentration. This is the first experimental work strongly suggesting that a phase separation into SC and normal-state regions takes place in the underodped regime of LSCO as well as in the overdoped regime.
- Physical Society of Japanの論文
- 2009-11-15
著者
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Koike Yoji
Department Applied Physics Graduate School Of Engineering Tohoku University
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Tanabe Yoichi
Department Of Applied Physics Graduate School Of Engineering Tohoku University
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Adachi Tadashi
Department Of Applied Physics Graduate School Of Engineering Tohoku University
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Omori Keisuke
Department Of Applied Physics Graduate School Of Engineering Tohoku University
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Adachi Tadashi
Department of Applied Physics, Graduate School of Engineering, Tohoku University, 6-6-05 Aoba, Aramaki, Aoba-ku, Sendai 980-8579
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Tanabe Yoichi
Department of Applied Physics, Graduate School of Engineering, Tohoku University, 6-6-05 Aoba, Aramaki, Aoba-ku, Sendai 980-8579
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