2006•Kluwer Academic Publishers eBooksOpen access

On Some Common Features in High- and Low-TC Superconducting Perovskites

I. Vobornik, D. Ariosa, Helmuth Berger, L. Forró, Rafael Gatt, M. Grioni, G. Margaritondo, M. Onellion, Torsten Schmauder, Davor Pavuna

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Abstract

Recent photoemission evidence for non-zero gap in highly overdoped Bi 2 Sr 2 -CaCu 2 O 8+x , along the directions in the Brillouin zone where the d -wave gap exhibits nodes, is in accordance with more conventional behavior in strongly overdoped high- T c cuprates. This differs from underdoped regime, where departures from Fermi-liquid (FL) behavior are found. Observed non-FL linear resistivity up to ~ 1050 K in low- T c perovskite Sr 2 RuO 4−δ is reminiscent of cuprates and implies some similarities between high- and low- T c perovskites.

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Recent photoemission evidence for non-zero gap in highly overdoped Bi 2 Sr 2 -CaCu 2 O 8+x , along the directions in the Brillouin zone where the d -wave gap exhibits nodes, is in accordance with more conventional behavior in strongly overdoped high- T c cuprates. This differs from underdoped regime, where departures from Fermi-liquid (FL) behavior are found. Observed non-FL linear resistivity up to ~ 1050 K in low- T c perovskite Sr 2 RuO 4−δ is reminiscent of cuprates and implies some similarities between high- and low- T c perovskites.

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Available abstract

Recent photoemission evidence for non-zero gap in highly overdoped Bi 2 Sr 2 -CaCu 2 O 8+x , along the directions in the Brillouin zone where the d -wave gap exhibits nodes, is in accordance with more conventional behavior in strongly overdoped high- T c cuprates. This differs from underdoped regime, where departures from Fermi-liquid (FL) behavior are found. Observed non-FL linear resistivity up to ~ 1050 K in low- T c perovskite Sr 2 RuO 4−δ is reminiscent of cuprates and implies some similarities between high- and low- T c perovskites.

Key concepts: Condensed matter physics, Brillouin zone, Cuprate, Superconductivity, Perovskite (structure), Electrical resistivity and conductivity, Fermi Gamma-ray Space Telescope, Physics

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