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.
| Original language | English |
|---|---|
| Article number | 014517 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 75 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2007 Jan 29 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Suppression of Cooper-pair tunneling in superconducting charge boxes in tunable electromagnetic environments. / Kuo, Watson; Wu, C. S.; Shyu, J. H.; Chen, C. D.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 75, No. 1, 014517, 29.01.2007.Research output: Contribution to journal › Article
TY - JOUR
T1 - Suppression of Cooper-pair tunneling in superconducting charge boxes in tunable electromagnetic environments
AU - Kuo, Watson
AU - Wu, C. S.
AU - Shyu, J. H.
AU - Chen, C. D.
PY - 2007/1/29
Y1 - 2007/1/29
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=33846415825&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33846415825&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.75.014517
DO - 10.1103/PhysRevB.75.014517
M3 - Article
AN - SCOPUS:33846415825
VL - 75
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 1
M1 - 014517
ER -