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Overdoped High Current Density Bi2-xPbxSr2CaCu2O8+δ Intrinsic Josephson Junction Mesas and Their Switching Current Distributions 下载免费PDF全文
Minoru SUZUKI Kenji HAMADA Ryota TAKEMURA Masayuki OHMAKI Itsuhiro KAKEYA 《中国物理快报》2010,27(8):207-210
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. 相似文献
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