The Essential Characteristics Of The Pseudogapped Metallic State Of High-T-C Superconductor
MODERN PHYSICS LETTERS B(1997)
Abstract
The pseudogapped metallic state which was recently revealed by angle-resolved photoemission experiments in the normal state of high-T-c superconductor (NTS) can be interpreted with a model of non-simple metal in which there are locally correlating carrier pairs and the coexisting single itinerant carriers. The pair correlation is temperature dependent with a delocalization process with decreasing temperature down to T-c, which can be revealed by the thermoelectric power S of HTS. By theoretical calculation, it is shown that a pseudogap exists in electronic energy spectrum of this two-component system in which high T-c and small superconducting coherence length can be obtained in its superconducting state.
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Key words
thermoelectric power,two component system
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