Suppression of Cooper-pair tunneling in superconducting charge boxes in tunable electromagnetic environments

Watson Kuo, C. S. Wu, J. H. Shyu, C. D. Chen

Research output: Contribution to journalArticle

2 Citations (Scopus)

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 languageEnglish
Article number014517
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume75
Issue number1
DOIs
Publication statusPublished - 2007 Jan 29

Fingerprint

Electrometers
Single electron transistors
Current voltage characteristics
Environmental impact
boxes
retarding
impedance
electromagnetism
electrometers
single electron transistors
oscillations
electric potential
excitation
energy

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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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 journalArticle

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