Observation of thermally excited charge transport modes in a superconducting single-electron transistor

Research output: Contribution to journalArticle

Researchers

Research units

  • University of Jyväskylä
  • Lomonosov Moscow State University

Abstract

Experiments on a superconducting single-electron transistor are reported. A new structure in the current-voltage characteristics at subgap voltages was observed when temperature was not too low as compared to the superconducting transition temperature Tc of the sample. The strength of the anomalies increases exponentially with temperature. The dominating features arise from matching of singularities in the density of states on two sides of a tunnel junction, and from the Josephson-quasiparticle cycle. Thermal excitations are essential for the former process, and they also make the latter process possible at low voltages.

Details

Original languageEnglish
Pages (from-to)305-310
Number of pages6
JournalEPL
Volume39
Issue number3
Publication statusPublished - 1997
MoE publication typeA1 Journal article-refereed

ID: 4432870