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Correlations in the low temperature specific heat across the superconducting regime of La2-xSrxCuO4 (0.05 ≤ x ≤ 0.27)

✍ Scribed by N.E. Hussey; D.F. Brewer; T.E. Hargreaves; C.S. McMenamin; A.L. Thomson; L.Z. Cao; Z.J. Chen

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
151 KB
Volume
194-196
Category
Article
ISSN
0921-4526

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✦ Synopsis

We present measuxements of the low temperature specific heat (0.09K< T < 1.5K) of seven samples of the La2_~Sr~CuO4 system (0.05< z <0.27). All the data were found to fit the expression, C = A(x)T -2 +a(x)T'~(~)+ fl(z)T 3. The coefficient of the nuclear specific heat contribution A(z) was found to have a minimum value for 0.15 < z < 0.2, i.e. near optimum doping. The exponent of the second term n(z) was always less than unity and showed a very systematic variation with St-doping, having a minimum value of n ~ 0.33 -L 0.07 for z = 0.15.

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