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Single electron effects and Bloch oscillations in high-Tc superconductive tunneling junctions

Journal Article


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Abstract


  • We investigated the effects of single electron charging energy in high-TC superconductors. Various phenomena originated from Coulomb blockade were observable in c-axis NdBa2Cu3O7delta/PrBa2Cu3O7delta/NdBa2Cu3O7delta superconducting tunnel junctions. The current-voltage characteristics show a Coulomb gap for Cooper pair tunneling when the charging energy exceeds the Josephson coupling energy. A crossover from Coulomb blockade of Cooper pair tunneling to a supercurrent is observed when the ratio of Josephson coupling energy to charging energy is increased. We found a regime in which aspects of the Coulomb blockade of tunneling coexist with features typical of Josephson tunneling. Under microwave irradiation of frequency f, the dynamic resistance dV/dI as a function of the current I showed sharp singularities at I=2nef, n=ñ1,ñ2,.... This behavior appears to be very similar to the one predicted by the semiclassical theory of Bloch oscillations. é2007 American Institute of Physics

UOW Authors


Publication Date


  • 2007

Citation


  • Alvarez, G. G., Wang, X., Dou, S. Xue. & Wu, M. Z. (2007). Single electron effects and Bloch oscillations in high-Tc superconductive tunneling junctions. Journal of Applied Physics, 101 (9, Part 2), 09G114-1-09G114-3.

Scopus Eid


  • 2-s2.0-34248530406

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1468&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/453

Has Global Citation Frequency


Start Page


  • 09G114-1

End Page


  • 09G114-3

Volume


  • 101

Issue


  • 9, Part 2

Abstract


  • We investigated the effects of single electron charging energy in high-TC superconductors. Various phenomena originated from Coulomb blockade were observable in c-axis NdBa2Cu3O7delta/PrBa2Cu3O7delta/NdBa2Cu3O7delta superconducting tunnel junctions. The current-voltage characteristics show a Coulomb gap for Cooper pair tunneling when the charging energy exceeds the Josephson coupling energy. A crossover from Coulomb blockade of Cooper pair tunneling to a supercurrent is observed when the ratio of Josephson coupling energy to charging energy is increased. We found a regime in which aspects of the Coulomb blockade of tunneling coexist with features typical of Josephson tunneling. Under microwave irradiation of frequency f, the dynamic resistance dV/dI as a function of the current I showed sharp singularities at I=2nef, n=ñ1,ñ2,.... This behavior appears to be very similar to the one predicted by the semiclassical theory of Bloch oscillations. é2007 American Institute of Physics

UOW Authors


Publication Date


  • 2007

Citation


  • Alvarez, G. G., Wang, X., Dou, S. Xue. & Wu, M. Z. (2007). Single electron effects and Bloch oscillations in high-Tc superconductive tunneling junctions. Journal of Applied Physics, 101 (9, Part 2), 09G114-1-09G114-3.

Scopus Eid


  • 2-s2.0-34248530406

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1468&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/453

Has Global Citation Frequency


Start Page


  • 09G114-1

End Page


  • 09G114-3

Volume


  • 101

Issue


  • 9, Part 2