Phys. Rev. Lett. 58, 408–410 (1987)Bulk superconductivity at 36 K in La1.8Sr0.2CuO4Received 29 December 1986; published in the issue dated 26 January 1987 We report the results of resistivity and magnetic susceptibility measurements in La2-xSrxCuO4 for x≤0.3. The x=0.2 sample shows a superconducting transition at 36.2 K with a width of 1.4 K. The associated dc diamagnetic susceptibility (Meissner effect) is a large fraction (60%–70%) of the ideal value. We estimate the density of states from critical-field and resistivity data and suggest, by analogy to BaPb1-xBixO3, that conventional phonon-mediated superconductivity can account for the high Tc in this class of materials. © 1987 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.58.408
DOI:
10.1103/PhysRevLett.58.408
PACS:
74.10.+v, 74.70.Ya
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