Pseudogap behavior in the electronic specific heat of La2-xSrxCuO4
Momono, N.; Matsuzaki, T.; Nagata, T.; Oda, M.; Ido, M.
Hokkaido Univ., Sapporo (Japan)1999
Hokkaido Univ., Sapporo (Japan)1999
AbstractAbstract
[en] In La214, the electronic specific heat coefficient γ (=Cel/T) is gradually suppressed with lowering T below a certain temperature T*(> Tc), where the in-plane resistivity ρ and magnetic susceptibility χ also tend to be suppressed slightly. Temperature T*, increasing with lowering x, is in qualitative agreement with the mean field Tc(Tco), estimated from the superconducting gap amplitude 2Δo at T muchlt Tc, as the onset temperature T* of a pseudogap in Bi2212. The gradual suppression of γ below approximately Tco implies that a pseudogap will also open up below approximately Tco in La214 as in Bi2212. In underdoped samples, whose pseudogap-like behaviors in Cel(T) become marked, the anomaly of Cel around Tc is rather different from the BCS expectation
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International Conference on Physics and Chemistry of Molecular and Oxide Superconductors, MOS'99; Stockholm (Sweden); 28 Jul - 2 Aug 1999
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Journal Article
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Conference
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ALKALINE EARTH METAL COMPOUNDS, CHALCOGENIDES, COPPER COMPOUNDS, ELECTRIC CONDUCTIVITY, ELECTRICAL PROPERTIES, LANTHANUM COMPOUNDS, MAGNETIC PROPERTIES, OXIDES, OXYGEN COMPOUNDS, PHYSICAL PROPERTIES, RARE EARTH COMPOUNDS, STRONTIUM COMPOUNDS, SUPERCONDUCTORS, THERMODYNAMIC PROPERTIES, TRANSITION ELEMENT COMPOUNDS
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