Electric Resistivity and Phase Diagram Viewed from Charges in La_<2-x>Sr_xCuO_4(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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The electric transport changes from the power-law temperature dependent resistivity ρ=a+bT^c to the logarithmic temperature dependent conductivity σ=d+elnT as temperature decreases across 90K in the underdoped phase. The crossover temperature is independent of the carrier density differently from the pseudo-spin-gap. The crossover is not caused by the simple relaxation time, but by the change of the density of states near the Fermi energy in the quasiparticle (resonant) peak at (π/2,π/2). The exponent c decreases from 2 at x=0.03 to 1 at x=0.16 and then increases to 1.4 at x=0.25.
- 社団法人日本物理学会の論文
- 2007-04-15
著者
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SUGAI Shunji
Department of Physics,Faculty of Science,Osaka University
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Sugai Shunji
Department Of Physics Division Of Material Science Nagoya University
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SHIOZAKI Ryozo
Department of Physics, Nagoya University
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Shiozaki Ryozo
Department Of Physics Faculty Of Science Nagoya University
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Takenaka Koshi
Riken (the Institute Of Physical And Chemical Research)
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Takenaka Koshi
Department Of Physics Faculty Of Science Nagoya University:(present Address)riken (the Institute Of
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Takenaka Koshi
Department Of Physics Nagoya University
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TAKAYANAGI Yasumasa
Department of Physics, Faculty of Science, Nagoya University
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NOHARA Jiro
Department of Physics, Faculty of Science, Nagoya University
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Nohara Jiro
Department Of Physics Faculty Of Science Nagoya University
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Sugai Shunji
Nagoya Univ. Nagoya
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Takayanagi Yasumasa
Nagoya Univ. Nagoya
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Takayanagi Yasumasa
Department Of Physics Faculty Of Science Nagoya University
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