Josephson Current through a Metallic Carbon Nanotube in the Conductance-Quantization Regime
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- Takane Yositake
- Department of Quantum Matter, Graduate School of Advanced Sciences of Matter, Hiroshima University
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説明
DC Josephson current through a metallic carbon nanotube with N conducting channels is studied at temperature T when the potential range of scatterers is larger than the lattice constant. With increasing length of the carbon nanotube, its conductance approaches the quantized value G0=4e2⁄h irrespective of N. Our attention is focused on the T-dependence of the Josephson critical current Ic in this conductance-quantization regime. The thermal length ξT, which characterizes Ic(T), is calculated by combining the Matsubara technique and the random-matrix approach. It is shown that ξT=hvF⁄(2πNkBT) (vF: the Fermi velocity). This indicates that Ic(T) depends on N, in contrast to the conductance which is given by G0 irrespective of N.
収録刊行物
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- Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｐｈｙｓｉｃａｌ Ｓｏｃｉｅｔｙ ｏｆ Ｊａｐａｎ
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Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｐｈｙｓｉｃａｌ Ｓｏｃｉｅｔｙ ｏｆ Ｊａｐａｎ 73 (5), 1111-1114, 2004
一般社団法人 日本物理学会
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詳細情報 詳細情報について
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- CRID
- 1390282679163111168
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- NII論文ID
- 110001954817
- 210000104784
- 130004538753
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- NII書誌ID
- AA00704814
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- BIBCODE
- 2004JPSJ...73.1111T
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 6940634
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- 本文言語コード
- en
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- NDL
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