BULK SUPERCONDUCTIVITY AT 36 K IN LA1.8SR0.2CUO4
BULK SUPERCONDUCTIVITY AT 36 K IN LA1.8SR0.2CUO4
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DOI：
10.1103/physrevlett.58.408
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发表时间：
1987-01-26
影响因子：
8.6
通讯作者：
RIETMAN, EA
中科院分区：
文献类型：
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作者：
CAVA, RJ;VANDOVER, RB;RIETMAN, EA
我们报告了x≤0.3时la2 - x Sr x cuo4的电阻率和磁化率测量结果。x= 0.2样品在36.2 K处出现了超导跃迁，宽度为1.4 K。相关的直流抗磁化率（迈斯纳效应）是理想值的很大一部分（60%-70%）。我们从临界场和电阻率数据中估计了态的密度，并提出，通过类比BaPb 1−x Bi x O 3，传统声子介导的超导性可以解释这类材料的高tc。
We report the results of resistivity and magnetic susceptibility measurements in La 2− x Sr x CuO 4 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 BaPb 1− x Bi x O 3, that conventional phonon-mediated superconductivity can account for the high T c in this class of materials.