Nonzero isotope effect in La1.85Sr0.15CuO4

Batlogg, B. ; Kourouklis, G. ; Weber, W. ; Cava, R. J. ; Jayaraman, A. ; White, A. E. ; Short, K. T. ; Rupp, L. W. ; Rietman, E. A. (1987) Nonzero isotope effect in La1.85Sr0.15CuO4 Physical Review Letters, 59 (8). pp. 912-914. ISSN 0031-9007

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The effect on the superconducting transition temperature of exchanging 18O for 16O in La1.85Sr0.15CuO4 has been studied. The concentration of the two isotopes has been determined by Rutherford backscattering spectroscopy and Raman spectroscopy confirmed the mass-related phonon frequency shift. The 18O substitution is found to be the same on the two O sites. Magnetic measurements of the transition temperature reveal a nonzero isotope effect (α=0.16±0.02). The exponent α has also been calculated within a conventional electron-phonon interaction model and was found to be significantly larger.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:13323
Deposited On:11 Nov 2010 08:07
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