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This study shows that in fcc lanthanum the measured ratio of superconducting energy gap to transition temperature strongly depends on annealing treatment. © 1967.
R.M. Feenstra, W.A. Thompson, et al.
Physical Review Letters
N.J. Dinardo, W.A. Thompson, et al.
Physical Review B
R. Imbihl, J.E. Demuth, et al.
Physical Review B
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CLEO 1984