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http://ir.ncue.edu.tw/ir/handle/987654321/15800
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| Title: | Suppression of Cooper-pair Tunneling in Superconducting Charge Boxes in Tunable Electromagnetic Environments |
| Authors: | Kuo, Watson;Wu, Cen-Shawn;Shyu, J. H.;Chen, C. D. |
| Contributors: | 物理學系 |
| Date: | 2007
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| Issue Date: | 2013-03-12T04:06:29Z
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| Publisher: | The American Physical Society |
| Abstract: | The Cooper-pair tunneling in superconducting charge boxes in tunable electromagnetic environments is experimentally studied using a single-electron-transistor electrometer and via current-voltage characteristics measurement with small excitations. In the low-impedance regime, the environmental effect is quantified with an effective Josephson coupling energy, which is found to decrease as the environment impedance increases. In the high-impedance regime, the Cooper-pair tunneling is blockaded. For impedance above 250 MΩ, Coulomb oscillation of the zero-bias conductance suggests that Cooper-pair tunneling is completely suppressed and subgap quasiparticle tunneling becomes dominant. |
| Relation: | Phys. Rev. B, 75(1): 014517 |
| Appears in Collections: | [物理學系] 期刊論文
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