| Overdoped High Current Density Bi2-xPbxSr2CaCu2O8＋δ Intrinsic Josephson Junction Mesas and Their Switching Current Distributions |
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| 作者姓名： | Minoru SUZUKI Kenji HAMADA Ryota TAKEMURA Masayuki OHMAKI Itsuhiro KAKEYA |
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| 作者单位： | Department of Electronic Science and Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan |
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| 摘 要： | Small and thin mesa structures of intrinsic Josephson junctions 1- 2μm on a side and 1.5-7.5 nm in thickness are fabricated from single crystals of Bi2-xPbxSr2CaCu2O8＋δ with a nominal Pb content x from 0.2 to 0.5. The Josephson critical current density jc is found to be pronouncedly large, ranging from 10 to 50 kA/cm^2. Switching current probability measurements for these mesa samples show an indication of a crossover to the macroscopic quantum tunneling region.
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| 关 键 词： | 约瑟夫森结 开关电流 高电流密度 电流分布 本征 超导 台地 临界电流密度 |
| 收稿时间： | 2010-6-7 |
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