Abstract
Superconducting tunnel junctions were fabricated on reactively sputtered NbN thin films. The NbN films were homogeneous and of single cubic phase; their transition temperatures were relatively high (14.0–17.3 K). Native oxide barriers and gold counter electrodes completed the junctions. Results ofdV/dI versusV measurements located the maximum energy gap near 3.30 meV, yielding a strong coupling parameter of above 4.5. Acoustic phonons were clearly observed ind 2 I/dV 2 versusV measurements at around 22.5 and 27.5 meV.
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References
E. J. Cukauskas,J. Appl. Phys. 54, 1013 (1983).
S. A. Wolf, I. L. Singer, E. J. Cukauskas, T. L. Francavilla, and E. F. Skelton,J. Vac. Sci. Technol. 17, 411 (1980).
R. T. Kampwirth and K. E. Gray,IEEE Trans. MAG-17, 565 (1981).
T. Akune, N. Sakamoto, and Y. Shibuya,Jpn. J. Appl. Phys. 21, 772 (1982).
E. K. Track, L. J. Lin, G. J. Cui, and D. E. Probes, inProceedings International Crystalline Materials Conference (1985).
M. Ashkin, J. R. Gavaler, J. Greggi, and M. Decroux,J. Appl. Phys. 55, 1044 (1984).
D. D. Bacon, A. T. English, S. Nakahara, F. G. Peters, H. Schreiber, W. R. Sinclair, and R. B. van Dover,J. Appl. Phys. 54, 6509 (1983).
Y. Hoshi, N. Terada, M. Naoe, and S. Yamanaka, inAdvances in Cryogenic Engineering Materials, Vol. 30, A. F. Clark and R. P. Reed, eds., (Plenum Press, New York, 1984), p. 607.
J. C. Villegier, L. Vieux-Rochez, M. Goniche, P. Renard, and M. Vabre,IEEE Trans. MAG-21, 488 (1985).
F. Shinoki, A. Shoji, S. Kosaka, S. Takada, and H. Hayakawa,Appl. Phys. Lett. 38, 285 (1981).
M. Hikita, K. Takei, and M. Igarashi,J. Appl. Phys. 54, 7066 (1983).
E. J. Cukauskas, M. Nisenoff, D. S. Jillie, H. Kroger, and L. N. Smith,IEEE Trans. Magn. MAG-19, 831 (1983).
R. B. Van Dover, D. D. Bacon, and W. R. Sinclair,Appl. Phys. Lett. 41, 764 (1982).
A. Shoji, F. Shinoki, S. Kosaka, M. Aoyagi, and H. Hayakawa,Appl. Phys. Lett. 41, 1097 (1982).
K. S. Keskor, T. Yamashita, and Y. Onodera,Jpn. J. Appl. Phys. 10, 370 (1971).
T. Yamashita, S. Kitahara, Y. Onodera, Y. Goto, and T. Aso,J. Appl. Phys. 43, 4749 (1972).
N. Terao,Jpn. J. Appl. Phys. 4, 353 (1965).
L. Chen, B. R. Zhao, S. M. Green, and H. L. Luo,J. Low Temp. Phys. 60, 239 (1985).
B. R. Zhao, L. Chen, H. L. Luo, M. D. Jack, and D. P. Mullins,Phys. Rev. B 29, 6198 (1984).
F. Gompf, W. Reichardt, and A. N. Christensen, Progress Report KFR 2357, Kernforschungszentrum, Karlsruhe (1976), p. 11.
F. Gompf, L. Pintschovius, W. Reichardt, and B. Scheerer, inProceedings Conference on Neutron Scattering, 1976, Gatlinburg, TN, R. M. Moon, ed., (National Technical Information Service, U.S. Department of Commerce), Vol. I, p. 129.
K. E. Kihlstrom, R. W. Simon, and S. A. Wolf,Phys. Rev. B 32, 1843 (1985).
M. Gurvitch, J. P. Remeika, J. M. Rowell, J. Geerk, and W. P. Lowe,IEEE Trans. MAG-21, 509 (1985).
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Chen, L., Green, S.M. & Luo, H.L. Superconducting tunneling on NbN thin films. J Low Temp Phys 64, 145–154 (1986). https://doi.org/10.1007/BF00685125
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DOI: https://doi.org/10.1007/BF00685125