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Subterahertz Josephson plasma emission in layered high-T-C superconducting tunnel junctions

Journal Article


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Abstract


  • We investigated the emission of subterahertz frequency electromagnetic radiation from high-TC superconducting c-axis NdBa2Cu3O7ÃÂÃÂÃÂâÃÂÃÂÃÂÃÂ/PrBa2Cu3O7ÃÂÃÂÃÂâNdBa2Cu3O7ÃÂÃÂÃÂàtrilayer thin film tunneling junctions when external electric and magnetic fields are applied. The current-voltage characteristics under applied ab-plane magnetic fields H (up 8 T) exhibit well defined steps, Vn, such that eVnhp/(2n), where the plasma frequency p0.4 THz and n=1,2,3,These steps may be interpreted using Josephson plasma dynamics. The applied voltage creates oscillating currents via the Josephson coupling energy EJ (EJ=hIJ/4e, where IJ is the Josephson current and h is Planck's constant) and the charge energy EC (EC=e2/2C, where C is the junction capacitance). Thus the Josephson plasma becomes excited by the tunneling current, with some of the energy being emitted as subterahertz frequency radiation. Our results provide a new insight into a solid-state quantum system with considerable potential for new solid-state terahertz emission sources.

Publication Date


  • 2008

Citation


  • Alvarez, G. G., Puzzer, T., Wang, X., Lewis, R. A., Freeth, C. A. & Dou, S. Xue. (2008). Subterahertz Josephson plasma emission in layered high-T-C superconducting tunnel junctions. In 2007 52nd Annual Conference on Magnetism and Magnetic Materials, 5-9 November, Tampa, Florida. Journal of Applied Physics, 103 (7), 07C719-1-07C719-3.

Scopus Eid


  • 2-s2.0-42149148789

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2186&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/1145

Has Global Citation Frequency


Start Page


  • 07C719-1

End Page


  • 07C719-3

Volume


  • 103

Issue


  • 7

Place Of Publication


  • USA

Abstract


  • We investigated the emission of subterahertz frequency electromagnetic radiation from high-TC superconducting c-axis NdBa2Cu3O7ÃÂÃÂÃÂâÃÂÃÂÃÂÃÂ/PrBa2Cu3O7ÃÂÃÂÃÂâNdBa2Cu3O7ÃÂÃÂÃÂàtrilayer thin film tunneling junctions when external electric and magnetic fields are applied. The current-voltage characteristics under applied ab-plane magnetic fields H (up 8 T) exhibit well defined steps, Vn, such that eVnhp/(2n), where the plasma frequency p0.4 THz and n=1,2,3,These steps may be interpreted using Josephson plasma dynamics. The applied voltage creates oscillating currents via the Josephson coupling energy EJ (EJ=hIJ/4e, where IJ is the Josephson current and h is Planck's constant) and the charge energy EC (EC=e2/2C, where C is the junction capacitance). Thus the Josephson plasma becomes excited by the tunneling current, with some of the energy being emitted as subterahertz frequency radiation. Our results provide a new insight into a solid-state quantum system with considerable potential for new solid-state terahertz emission sources.

Publication Date


  • 2008

Citation


  • Alvarez, G. G., Puzzer, T., Wang, X., Lewis, R. A., Freeth, C. A. & Dou, S. Xue. (2008). Subterahertz Josephson plasma emission in layered high-T-C superconducting tunnel junctions. In 2007 52nd Annual Conference on Magnetism and Magnetic Materials, 5-9 November, Tampa, Florida. Journal of Applied Physics, 103 (7), 07C719-1-07C719-3.

Scopus Eid


  • 2-s2.0-42149148789

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2186&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/1145

Has Global Citation Frequency


Start Page


  • 07C719-1

End Page


  • 07C719-3

Volume


  • 103

Issue


  • 7

Place Of Publication


  • USA