Influence of Electromagnetic Environment on Tunneling Current through Normal Metal-Superconductor Junctions
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概要
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Based on a tunneling Hamiltonian model, the two-electron tunneling current through normal metal-superconductor junctions is studied by incorporating the influence of a dissipative electromagnetic environment with an Ohmic resistor R. We show that at low bias voltages the two-electron tunneling current displays a power-law behavior as I∝V^<4g+1>, where g=e^2R/π&plank; at zero temperature due to electromagnetic fluctuations. This suggests that suppression of the two-electron tunneling current is more remarkable compared with the usual tunneling current in normal junctions where 1∝V^<g+1>.
- 社団法人日本物理学会の論文
- 1995-12-15
著者
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Takane Yositake
Department Of Applied Physics Osaka City University
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Nakamura Katsuhiro
Department Of Applied Physics Faculty Of Enginering Osaka City University
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