Electronic specific heat of La{sub 2-x}Sr{sub x}Cu{sub 1-y}M{sub y}O{sub 4} (M=Ga, Zn): Impurity effects on a D-wave superconductor

Journal Article · Fri Nov 01 04:00:00 EST 1996 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1007/BF00768438· OSTI ID:457209

Momono, N; Nakano, T; Oda, M; Ido, M ^[1]

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1. Hokkaido Univ., Sapporo (Japan)

The electronic specific heat C{sub el} was studied in Ga- and Zn-doped La{sub 2{minus}x}Sr{sub x}CuO{sub 4} (0.16{le} x {le} 0.22) at T {le}10K. Partial substitution of Ga or Zn for Cu suppresses T{sub c}, and revives the T-linear electronic specific heat, {gamma}T, markedly. The {gamma}(y)/{gamma}{sub N} vs T{sub c}/T{sub c0} relation for Zn-doped samples with x{ge}0.2 is in good agreement with the theoretical one for resonant impurity scattering in a d-wave superconductor, while those for Ga-doped samples and for Zn-doped samples with x<0.2 deviates lightly from the theoretical curve. The deviation will be discussed in relation to changes in the magnetic properties of 3d electrons.

• Sponsoring Organization: USDOE
• OSTI ID: 457209
• Report Number(s): CONF-960808--
• Journal Information: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 105; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER OXIDES
DOPED MATERIALS
ELECTRONIC SPECIFIC HEAT
GALLIUM ADDITIONS
HIGH-TC SUPERCONDUCTORS
LANTHANUM OXIDES
STRONTIUM OXIDES
TEMPERATURE RANGE 0000-0013 K
ZINC ADDITIONS