Energy gap measurement in ultrasmall sup
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Akinobu Kanda; Martin.C. Geisler; Koji Ishibashi; Yoshinobu Aoyagi; Takuo Sugano
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Article
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1999
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Elsevier Science
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English
β 291 KB
We have measured the energy gap of an ultrasmall superconducting ring by using small tunnel junctions. Transitions between different quantum states were observed. The transition points at low temperatures agree well with the theoretical prediction, while those at higher temperatures are in the regi