Tunnel junctions using oxide superconducting thin films epitaxially grown on SrTiO3

Takada, J.; Terashima, T.; Bando, Y.; Mazaki, H.; Iijima, K.; Yamamoto, K.; Hirata, K.
December 1988
Applied Physics Letters;12/26/1988, Vol. 53 Issue 26, p2689
Academic Journal
Normal-metal/insulator/superconductor (NIS) junctions were fabricated using thin films of YBa2Cu3O7-x (YBCO) or ErBa2Cu3O7-x. These were epitaxially grown on single-crystal SrTiO3 by the activated reactive evaporation method. For some NIS junctions prepared on SrTiO3 (110) substrates, we observed multipeaks in the differential conductance versus voltage curve. NIS junctions using single-crystal YBCO films on SrTiO3 (100) showed a set of peaks, from which we obtained a gap parameter of 11.5±1.5 meV at 4.4 K and a coupling constant of 3.2±0.4.


Related Articles

  • Preparation of superconducting thin films of calcium strontium bismuth copper oxides by coevaporation. Rice, C. E.; Levi, A. F. J.; Fleming, R. M.; Marsh, P.; Baldwin, K. W.; Anzlowar, M.; White, A. E.; Short, K. T.; Nakahara, S.; Stormer, H. L. // Applied Physics Letters;5/23/1988, Vol. 52 Issue 21, p1828 

    Superconducting films of Ca-Sr-Bi-Cu oxides have been prepared by coevaporation of CaF2, SrF2, Bi, and Cu, followed by post-oxidation in wet O2. The films were characterized by four-probe resistivity measurements, Rutherford backscattering, transmission electron microscopy, x-ray diffraction,...

  • In situ growth of superconducting Nd-Ce-Cu-O thin films. Terashima, T.; Bando, Y.; Iijima, K.; Yamamoto, K.; Hirata, K.; Hayashi, K.; Matsuda, Y.; Komiyama, S. // Applied Physics Letters;2/12/1990, Vol. 56 Issue 7, p677 

    Superconducting Nd-Ce-Cu-O thin films were epitaxially grown on SrTiO3 (100) by activated reactive evaporation. As-grown films showed the metallic temperature dependence of the resistivity and superconducting transition at 12.5 K (R=0). The remarkable parallel shift of the onset temperature of...

  • Highly aligned, spin polarized thin films of Sr[sub 2]FeMoO[sub 6] by a chemical vapor process. Rager, J.; Berenov, A. V.; Cohen, L. F.; Branford, W. R.; Bugoslavsky, Y. V.; Miyoshi, Y.; Ardakani, M.; MacManus-Driscoll, J. L. // Applied Physics Letters;12/23/2002, Vol. 81 Issue 26, p5003 

    Highly oriented films of Sr[sub 2]FeMoO[sub 6] were fabricated by ultrasonic spray pyrolysis. A combined organic/inorganic solution was developed and the films were deposited on single-crystal LaA1O[sub 3] between 600°C and 900°C followed by postannealing at 850°C or 1200°C in Ar/5%...

  • On the effect of hydrogen incorporation in strontium titanate layers grown by high vacuum... Schneider, Jochen M.; Hjorvarsson, Bjorgvin // Applied Physics Letters;11/29/1999, Vol. 75 Issue 22, p3476 

    Studies the effect of hydrogen incorporation in strontium titanate layers grown by high vacuum magnetron sputtering. Amount of hydrogen in the films and growth temperature; Microstructure of films deposited.

  • Roles of the first atomic layers in growth of SrTiO[sub 3] films on LaAlO[sub 3] substrates. Dong-Wook Kim; Dae-Ho Kim; Bo-Soo Kang; Noh, T.W.; Lee, D.R.; Lee, K.-B. // Applied Physics Letters;4/12/1999, Vol. 74 Issue 15, p2176 

    Determines the roles of first atomic layers in the growth of SrTiO[sub 3] films on LaAlO[sub 3] substrates. Transition from layer-by-layer growth to island growth seen in the electrically compensated initial layer in the LaO-terminated substrate; Defects in the noncompensated initial layer in...

  • Preparation of oriented Bi-Ca-Sr-Cu-O thin films using pulsed laser deposition. Fork, D. K.; Boyce, J. B.; Ponce, F. A.; Johnson, R. I.; Anderson, G. B.; Connell, G. A. N.; Eom, C. B.; Geballe, T. H. // Applied Physics Letters;7/25/1988, Vol. 53 Issue 4, p337 

    Oriented c-axis thin films of Bi-Ca-Sr-Cu-O on [100] SrTiO3 substrates have been fabricated using the pulsed excimer laser evaporation technique. Deposition at room temperature in 1 mTorr oxygen followed by an 875 °C anneal in oxygen yields superconducting films with zero resistance at 80 K...

  • Nucleation and growth of YBaCuO on SrTiO3. Clemens, B. M.; Nieh, C. W.; Kittl, J. A.; Johnson, W. L.; Josefowicz, J. Y.; Hunter, A. T. // Applied Physics Letters;11/7/1988, Vol. 53 Issue 19, p1871 

    We have studied transmission electron microscopy (TEM) cross sections and plan views of YBaCuO films on SrTiO3 single-crystal substrates at various stages of post-deposition anneal. These TEM studies reveal in extraordinary detail the process of nucleation of epitaxial crystal structure...

  • Epitaxial growth of YBa2Cu3O7-x thin films by a laser evaporation process. Roas, B.; Schultz, L.; Endres, G. // Applied Physics Letters;10/17/1988, Vol. 53 Issue 16, p1557 

    Thin films of YBa2 Cu3 O7-x have been grown epitaxially in c-axis orientation on <100> SrTiO3 by pulsed excimer laser evaporation from a stoichiometric 1-2-3 target. The substrate temperature was adjusted between 720 and 780 °C, and the oxygen partial pressure during the deposition was chosen...

  • Role of bismuth precursor in crystallization of SrBi[sub 2] Ta[sub 2] O[sub 9] thin films. Tirumala, S.; Desu, S.B.; Rastogi, A. // Applied Physics A: Materials Science & Processing;2000, Vol. 70 Issue 3, p253 

    Crystallization of SrBi[sub 2] Ta[sub 2] O[sub 9] (SBT) thin films was studied as a function of viscosity of bismuth precursor and baking temperature, in order to fabricate capacitors with improved ferroelectric properties. SBT thin films were deposited on to Pt substrates using a chemical...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics