Short-Pulse Intrinsic Tunneling Spectroscopy in Bi2Sr2CaCu2O8+\delta under Suppressed Self Heating
スポンサーリンク
概要
- 論文の詳細を見る
Short-pulse tunneling spectroscopy on a time scale of 300 ns has been conducted using intrinsic Josephson junctions naturally built in the crystal structure of a slightly underdoped Bi2Sr2CaCu2O8+\delta (Bi2212) by fabricating a very small and thin mesa of 6 nm in thickness and less than 5 μm in square width. The results are characterized by a pronounced superconducting peak at 79 meV accompanied by a broad pseudgap at a much higher energy of 125 meV, indicating discrete nature of both energy structures. The temperature rise due to self-heating in a small mesa is numerically calculated based on temperature-dependent thermal conductivity and specific heat for each constituent material. It is found that the temperature rise is less than 2 K for the present experiment, which reinforces that the tunneling spectra obtained represent the genuine superconducting properties of Bi2212.
- 2012-01-25
著者
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Suzuki Minoru
Department Of Applied Biological Chemistry Graduate School Of Agricultural And Life Sciences The Uni
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HAMADA Kenji
Department of Industrial Chemistry, Faculty of Engineering, Kogakuin Univ.
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Watanabe Takao
Departmant Of Mathematics Faculty Of Science Osaka University
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Ohmaki Masayuki
Department of Electronic Science and Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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Takemura Ryota
Department of Electronic Science and Engineering, Kyoto University, Kyoto 615-8510, Japan
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Ohmaki Masayuki
Department of Electronic Science and Engineering, Kyoto University, Kyoto 615-8510, Japan
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Hamada Kenji
Department of Electronic Science and Engineering, Kyoto University, Kyoto 615-8510, Japan
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Watanabe Takao
Department of Advanced Physics, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
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