Pseudogap behavior in the electronic specific heat of La{sub 2{minus}x}Sr{sub x}CuO{sub 4}

Journal Article · Mon Nov 01 04:00:00 EST 1999 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1023/A:1022565515931· OSTI ID:20012815

Momono, N; Matsuzaki, T; Nagata, T; Oda, M; Ido, M

In La214, the electronic specific heat coefficient {gamma} (=C{sub el}/T) is gradually suppressed with lowering T below a certain temperature T*({gt} {Tc}), where the in-plane resistivity {rho} and magnetic susceptibility {chi} also tend to be suppressed slightly. Temperature T*, increasing with lowering x, is in qualitative agreement with the mean field {Tc}(T{sub co}), estimated from the superconducting gap amplitude 2{Delta}{sub o} at T {much{underscore}lt} {Tc}, as the onset temperature T* of a pseudogap in Bi2212. The gradual suppression of {gamma} below {approximately} T{sub co} implies that a pseudogap will also open up below {approximately} T{sub co} in La214 as in Bi2212. In underdoped samples, whose pseudogap-like behaviors in C{sub el}(T) become marked, the anomaly of C{sub el} around {Tc} is rather different from the BCS expectation.

• Research Organization: Hokkaido Univ., Sapporo (JP)
• OSTI ID: 20012815
• Journal Information: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 117; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER OXIDES
ENERGY GAP
HIGH-TC SUPERCONDUCTORS
LANTHANUM OXIDES
MAGNETIC SUSCEPTIBILITY
SPECIFIC HEAT
STRONTIUM OXIDES
SUPERCONDUCTIVITY
TRANSITION TEMPERATURE