期刊
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
卷 341, 期 -, 页码 831-834出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0921-4534(00)00706-1
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From measurements of the electronic specific heat of three Bi2212 samples we show that the normal state pseudogap opens abruptly in the weakly overdoped region at p(crit) similar to 0.19 holes/CuO(2) and increases as Eg(p)/(k)B similar to 980(1-p/p(crit)) (K) at lower doping.. The condensation energy U(0) peaks strongly at p(crit) exhibiting strong BCS-like superconductivity (U(0)/gammaT(c)(2) similar to 0.28) for p > p(crit) and weak superconductivity below p(crit). We conclude that the pseudogap is a property of the normal state DOS and is not related to precursor superconducting fluctuations.
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