Parallel array of YBa2Cu3O7-δ superconducting Josephson vortex-flow transistors with high current gains

Chesca, Boris; John, Daniel; Kemp, Matthew; Brown, Jeffrey; Mellor, Christopher
August 2013
Applied Physics Letters;8/26/2013, Vol. 103 Issue 9, p092601
Academic Journal
We have developed a Josephson vortex-flow transistor based on a parallel array of 440 YBa2Cu3O7-δ bicrystal grain boundary Josephson junctions. The array's critical current Ic was measured as a function of the control current Ictrl through a control line that is inductively coupled to the array. The device has a highly asymmetric Ic(Ictrl) curve with several regions where a switching behaviour is observed characterized by a maximum current gain gmax = ∂Ic/∂Ictrl of 19 and a significant dynamic range of 20 μA at 77 K. In the range 4.7-92 K gmax versus temperature is non-monotonic with a maximum recorded at 77 K.


Related Articles

  • Spatially resolved analysis of high-Tc grain boundary Josephson junctions and arrays. Gerdemann, R.; Husemann, K.-D.; Gross, R.; Alff, L.; Beck, A.; Elia, B.; Reuter, W.; Siegel, M. // Journal of Applied Physics;12/15/1994, Vol. 76 Issue 12, p8005 

    Presents information on a study which analyzed the spread of the critical current values in one- and two-dimensional arrays of high-T[subc] grain boundary Josephson junctions. Experimental techniques; Theoretical background on the interpretation of the electron beam induced signal measured...

  • La[sub1.85]Sr[sub0.15]CuO[sub4-delta] bicrystal grain boundary Josephson junctions. Beck, A.; Froehlich, O.M.; Koelle, D.; Gross, R.; Sato, H.; Naito, M. // Applied Physics Letters;6/3/1996, Vol. 68 Issue 23, p3341 

    Investigates the fabrication of La[sub 1.85]Sr[sub 0.15]CuO[sub 4-delta] (LSCO) grain boundary Josephson (GBJ) junctions on tilt SrTiO[sub 3] bicrystals. Presence of dielectric layer at the grain boundary; Reduction of critical current density; Explanation on the measured transport properties...

  • Transport and structural properties of the top and bottom grain boundaries in YBa[sub 2]Cu[sub 3]O[sub 7-δ] step-edge Josephson junctions. Lombardi, Filomena; Ivanov, Z. G.; Fischer, G. M.; Olsson, E.; Claeson, T. // Applied Physics Letters;1/12/1998, Vol. 72 Issue 2 

    We present a method to study separately the electrical transport properties of the grain boundaries (GBs) formed at the top and at the bottom edges of YBa[sub 2]Cu[sub 3]O[sub 7-δ](YBCO) step-edge Josephson junctions. The step-edge junctions were fabricated on (100) LaAlO[sub 3] steps using...

  • Spatial variation of the current in grain boundary Josephson junctions. Carmody, M.; Moeckly, B. H. // Journal of Applied Physics;3/1/2000, Vol. 87 Issue 5, p2454 

    Provides information on a study which determined the spatial variation of the current across the boundary in several grain boundary Josephson junctions using direct methods. Relationship between the microstructure and transport properties of Josephson junctions; Results and discussion.

  • A linearized Josephson-Fraunhofer magnetometer with high-temperature Josephson junction. Dolabdjian, C.; Poupard, P.; Martin, V.; Gunther, C.; Hamet, J.F.; Robbes, D. // Review of Scientific Instruments;Dec1996, Vol. 67 Issue 12, p4171 

    Focuses on a Josephson-Fraunhofer magnetometer based on the shrinking of the Fraunhofer pattern exhibited by grain boundaries Josephson (GBJ) junctions. Use of flux focuser and GBJ function directly patterned on a single chip; Device's operation in a field locked loop as conventional...

  • Accurate calculation of capacitances of grain boundary Josephson junctions in high critical temperature superconductors. Töpfer, H.; Mäder, G.; Uhlmann, H. // Journal of Applied Physics;5/1/1995, Vol. 77 Issue 9, p4576 

    Presents information on a study which reported a quantitative calculation of the capacitances of contemporary high critical temperature grain boundary Josephson junctions. Basis of the calculation principle; Types of Josephson junctions; Calculation of charge density distribution.

  • Transport properties in Tl-Ba-Ca-Cu-O grain boundary junctions on SrTiO[sub 3] bicrystal substrates. Sarnelli, E.; Chaudhari, P. // Applied Physics Letters;7/18/1994, Vol. 65 Issue 3, p362 

    Investigates the electrical properties of Ti-Ba-Ca-Cu-O superconductor grain boundary junctions on strontium titanate bicrystal substrate. Dependence of critical current on temperature; Details on the scaling behavior of the Josephson current density; Correlation between flux noise and voltage...

  • Critical current of a high T[sub c] Josephson grain boundary junction in high magnetic field. Daumling, M.; Sarnelli, E. // Applied Physics Letters;9/14/1992, Vol. 61 Issue 11, p1355 

    Measures the critical current of the I[sub c] of YBa[sub 2]Cu[sub 3]O[sub 7-delta]grain boundary Josephson junctions. Observation of the magnetic field history dependent values of I[sub c]; Anomalous increase of I[sub c] in high magnetic fields of several Telsa; Role of the grain boundaries in...

  • Persistent photoconductivity in high T[sub c] grain boundary Josephson junctions. Hoffmann, A.; Schuller, Ivan K. // Applied Physics Letters;5/5/1997, Vol. 70 Issue 18, p2461 

    Explores the photoconductivity on YBa[sub 2]Cu[sub 3]O[sub x] bicrystal grain boundary Josephson junctions. Effect of illumination on the Josephson junctions; Composition of grain boundary in films; Determination of the average oxygen content; Threshold of the spectral dependence for...


Read the Article


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

Try another library?
Sign out of this library

Other Topics