Increased superconducting transition temperature of a niobium thin film proximity coupled to gold nanoparticles using linking organic molecules

Eran Katzir, Shira Yochelis, Felix Zeides, Nadav Katz, Yaov Kalcheim, Oded Millo, Gregory Leitus, Yuri Myasodeyov, Boris Ya Shapiro, Ron Naaman, Yossi Paltiel

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The superconducting critical temperature, T C, of thin Nb films is significantly modified when gold nanoparticles (NPs) are chemically linked to the Nb film, with a consistent enhancement when using 3 nm long disilane linker molecules. The T C increases by up to 10% for certain linker length and NP size. No change is observed when the nanoparticles are physisorbed with nonlinking molecules. Electron tunneling spectra acquired on the linked NPs below T C typically exhibit zero-bias peaks. We attribute these results to a pairing mechanism coupling electrons in the Nb and the NPs, mediated by the organic linkers.

Original languageEnglish
Article number107004
JournalPhysical Review Letters
Volume108
Issue number10
DOIs
StatePublished - 8 Mar 2012

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