Diffusive Josephson junctions made out of multiwalled carbon nanotubes

T. Tsuneta*, L. Lechner, P. J. Hakonen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

1 Citation (Scopus)
92 Downloads (Pure)

Abstract

We have investigated electrical transport in diffusive multiwalled carbon nanotubes (MWNT) contacted using superconducting leads made of Ti/Al/Ti sandwich structure. We measure proximity-induced supercurrents up to Icm 1.3 nA and find tunability by the gate voltage due to variation of the Thouless energy via the diffusion constant that is controlled by scattering in the MWNT. The modeling of these results by long, diffusive SNS junctions, supplemented with phase diffusion effects is discussed: the agreement between theory and experiments is tested especially on the basis of the temperature dependence of the Josephson coupling energy. In order to prove conclusively that the diffusive model works for MWNT proximity junctions, we propose an improved measurement scheme that is based on the kinetic inductance of superconducting junctions.

Original languageEnglish
Title of host publication25TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT25), PART 2
Pages1-4
Number of pages4
DOIs
Publication statusPublished - 2009
MoE publication typeA4 Article in a conference publication
EventInternational Conference on Low Temperature Physics - Amsterdam, Netherlands
Duration: 6 Aug 200813 Aug 2008
Conference number: 25

Publication series

NameJournal of Physics Conference Series
NumberPart 2
Volume150
ISSN (Print)1742-6588

Conference

ConferenceInternational Conference on Low Temperature Physics
Abbreviated titleLT
CountryNetherlands
CityAmsterdam
Period06/08/200813/08/2008

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