文章基本信息

标题：Pauli-limit upper critical field of high-temperature superconductor La1.84Sr0.16CuO4
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作者：Daisuke Nakamura ; Tadashi Adachi ; Keisuke Omori 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2019
卷号：9
期号：1
页码：1-8
DOI：10.1038/s41598-019-52973-1
出版社：Springer Nature
摘要：The upper critical field of a cuprate high-temperature superconductor, La 1.84 Sr 0.16 CuO 4 , was investigated by high-frequency self-resonant contactless electrical conductivity measurements in magnetic fields up to 102 T. An irreversible transition was observed at 85 T (T = 4.2 K), defined as the upper critical field. The temperature-dependent upper critical field was argued on the basis of the Werthamer-Helfand-Hohenberg theory. The Pauli-limiting pair-breaking process with a small contribution of the spin-orbit coupling explained the first-order phase transition exhibiting a hysteresis observed at low temperatures.