Laboratory of Theoretical and Experimental Superconducting Tunneling

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Publications

2006

  1. R.S. Gonnelli, D. Daghero, G.A. Ummarino, A. Calzolari, M. Tortello, V.A. Stepanov, N.D. Zhigadlo, K. Rogacki, J. Karpinski
    "The effect of magnetic impurities in a two-band superconductor: A point-contact study of Mn-substituted MgB2 single crystals.", accepted for the publication in Physical Review Letters.

  2. R.S. Gonnelli, D. Daghero, A. Calzolari, G.A. Ummarino, M. Tortello, V.A. Stepanov, N.D. Zhigadlo, K. Rogacki, J. Karpinski, C. Portesi, E. Monticone, D. Veldhuis, A. Brinkman
    "Recent achievements in MgB2 physics and applications: A large-area SQUID magnetometer and point-contact spectroscopy measurements.", Physica C 435, 59 (2006). pdf

  3. R.S. Gonnelli, D. Daghero, G.A. Ummarino, A. Calzolari, Valeria Dellarocca, V.A. Stepanov, S.M. Kazakov, J. Jun, J. Karpinski
    "A point-contact study of the superconducting gaps in Al-substituted and C-substituted MgB2 single crystals", Journal of Physics and Chemistry of Solids 67, 360 (2006). pdf

  4. D. Daghero, R.S. Gonnelli, G.A. Ummarino, A. Calzolari, Valeria Dellarocca, V.A. Stepanov, S.M. Kazakov, J. Jun, J. Karpinski
    "Effect of the magnetic field on the gaps of MgB2: a directional point-contact study", Journal of Physics and Chemistry of Solids 67, 424 (2006). pdf

  5. A. Calzolari, D. Daghero, R.S. Gonnelli, G.A. Ummarino, V.A. Stepanov, R. Masini, Maria Roberta Cimberle, M. Ferretti
    "Andreev-reflection measurements in RuSr2GdCu2O8", Journal of Physics and Chemistry of Solids 67, 597 (2006). pdf

  6. C. Portesi, D. Mijatovic, D. Veldhuis, A. Brinkman, E. Monticone, R. S. Gonnelli
    "MgB2 magnetometer with a directly coupled pick-up loop", Superconductor Science and Technology 19, S303 (2006). pdf

2005

  1. G.A. Ummarino
    "Pressure dependence of critical temperature in MgB2 and two bands Eliashberg theory", Physica C 423, 96 (2005). pdf

  2. J. Karpinski, N. Zhigadlo, G. Shuck, S.M. Kazakov, B. Batlogg, K. Rogacki, R. Puzniak, J. Jun, E. Muller, P. Wagli, R.S. Gonnelli, D. Daghero, G.A. Ummarino, V.A. Stepanov
    "Al substitution in MgB2 crystals: influence on superconducting and structural properties", Physical Review B 71, 174506 (2005). pdf

  3. R.S. Gonnelli, D. Daghero, G.A. Ummarino, A. Calzolari, Valeria Dellarocca, V.A. Stepanov, N. Zhigadlo, S.M. Kazakov, J. Karpinski
    "Evidence for one-gap superconductivity in Mg(B1-xCx )2 single crystals at x=0.132 by point-contact spectroscopy", Journal of Superconductivity 18, 681 (2005). pdf

  4. G.A. Ummarino, R.S. Gonnelli, A. Bianconi
    "Two-band Eliashberg theory in doped MgB2: experimental Tc and superconductive gaps", Journal of Superconductivity 18, 791 (2005). pdf

  5. V. Dellarocca, R. S. Gonnelli, S. Bodoardo, N. Penazzi, G. Grenci, C. Portesi, M. Rajteri, A. Morawski, T. Lada
    "Synthesis of MgB2 thick films by electrophoresis technique: structural and superconductive characterization.", Physica Status Solidi C 5, 1662 (2005). pdf

  6. D. Daghero, R.S. Gonnelli, A. Calzolari, G.A. Ummarino, Valeria Dellarocca, V.A. Stepanov, N. Zhigadlo, S.M. Kazakov, J. Karpinski
    "The superconducting gaps of C-substituted and Al-substituted MgB2 single crystals by point-contact spectroscopy", Physica Status Solidi C 5, 1656 (2005). pdf

  7. G.A. Ummarino, D. Daghero, R.S. Gonnelli, A.H. Moudden
    "Carbon substitutions in MgB2 within the two-band Eliashberg theory", Physical Review B 71, 134511 (2005). pdf

  8. R.S. Gonnelli, D. Daghero, A. Calzolari, G.A. Ummarino, Valeria Dellarocca, V.A. Stepanov, S.M. Kazakov, N. Zhigadlo, J. Karpinski
    "Evidence for single-gap superconductivity in Mg(B1-xCx )2 single crystals with x=0.132 from point-contact spectroscopy", Physical Review B 71, 060503R (2005). pdf

  9. M. Putti, C. Ferdeghini, M. Monni, I. Pellecchi, C. Tarantini, P. Manfrinetti, A. Palenzona, D. Daghero, R.S. Gonnelli, V.A. Stepanov
    "Critical field of Al-doped MgB2 samples: correlation with the suppression of sigma band gap", Physical Review B 71, 144505 (2005). pdf

2004

  1. R.S. Gonnelli, D. Daghero, A. Calzolari, G.A. Ummarino, Valeria Dellarocca, V.A. Stepanov, S.M. Kazakov, J. Karpinski, C. Portesi, E. Monticone, V. Ferrando, C. Ferdeghini
    "Point-contact spectroscopy in MgB2: from fundamental physics to thin-film characterization", Applied Superconductivity 2003, Proceedings of the 6th European Conference on Applied Superconductivity, Inst. Phys. Conf. Ser. No 181, 157 (2004). pdf

  2. G.A. Ummarino, A. Calzolari, D. Daghero, R.S. Gonnelli, V.A. Stepanov, R. Masini, M.R. Cimberle
    "Point-contact study of gap amplitude and symmetry in RuSr2GdCu2O8", Applied Superconductivity 2003, Proceedings of the 6th European Conference on Applied Superconductivity, Conference CD pag. 1146 (2004). pdf

  3. G.A. Ummarino, R.S. Gonnelli, S. Massidda, A. Bianconi
    "Two-band Eliashberg equations and the experimental Tc of the diboride Mg1-x Alx B2", Physica C 407, 121 (2004). pdf

  4. E. Monticone, C. Gandini, Chiara Portesi, M. Rajteri, Silvia Bodoardo, N. Penazzi, Valeria Dellarocca, R.S. Gonnelli
    "MgB2 thin films on silicon nitride substrates prepared by an in-situ method", Superconductor: Science and Technology 17, 649 (2004). pdf

  5. D. Daghero, R.S. Gonnelli, G.A. Ummarino, O.V. Dolgov, J. Kortus, A.A. Golubov, S.V. Shulga
    "The determination of the electron-phonon interaction from tunneling data in the two-band superconductor MgB2", Physica C 408-410, 353 (2004). pdf

  6. R.S. Gonnelli, D. Daghero, A. Calzolari, G.A. Ummarino, Valeria Dellarocca, V.A. Stepanov, J. Jun, S.M. Kazakov, J. Karpinski
    "Directional point-contact spectroscopy of MgB2 single crystals in magnetic fields: two-band superconductivity and critical fields", Physica C 408-410, 796 (2004). pdf

  7. R.S. Gonnelli, D. Daghero, G.A. Ummarino, Valeria Dellarocca, A. Calzolari, V.A. Stepanov, J. Jun, S.M. Kazakov, J. Karpinski
    "Magnetic-field dependence of the gaps in a two-band superconductor: a point-contact study of MgB2 single crystals", Phys. Rev. B 69, 100504(R) (2004). pdf

  8. D. Daghero, R.S. Gonnelli, G.A. Ummarino, A. Calzolari, Valeria Dellarocca, V.A. Stepanov, V.B. Filippov, Y.B. Paderno
    "Andreev-reflection spectroscopy in ZrB12 single crystals", Superconductor: Science and Technology, 17, S250 - S254 (2004). pdf

  9. R.S. Gonnelli, D. Daghero, A. Calzolari, G.A. Ummarino, Valeria Dellarocca, V.A. Stepanov, S.M. Kazakov, J. Karpinski, C. Portesi, E. Monticone, V. Ferrando, C. Ferdeghini
    "Point-contact spectroscopy in MgB2 : from fundamental physics to thin-film characterization", Superconductor: Science and Technology, 17, S93 - S100 (2004), invited. pdf

2003

  1. O.V. Dolgov, R.S. Gonnelli, G.A. Ummarino, A.A. Golubov, S.V. Shulga, J. Kortus
    "Extraction of the electron-phonon-interaction from tunneling data in the multigap superconductor MgB2", Physical Review B, 68, 132503 (2003). pdf

  2. A. Shukla, M. Calandra, M. d’Astuto, M. Lazzeri, F. Mauri, C. Bellin, M. Krish, J. Karpinski, S.M. Kazakov, J. Jun, D. Daghero, K. Parlinski
    "Phonon dispersion and lifetimes in MgB2", Physical Review Letters, 90, 095506 (2003). pdf

  3. D. Daghero, R.S. Gonnelli, G.A. Ummarino, V.A. Stepanov
    "Possible evidence of a d+id scenario in La2-xSrxCuO4 by Andreev reflection measurements", International Journal of Modern Physics B, Vol. 17, Nos. 4, 5 & 6, 649-654 (2003).

  4. G.A. Ummarino, R.S. Gonnelli, O.V. Dolgov, S.V. Shulga
    "Electron-phonon spectral function and two-band model in tunneling measurement on MgB2", International Journal of Modern Physics B, Vol. 17, Nos. 4, 5 & 6, 643-648 (2003).

  5. D. Daghero, R.S. Gonnelli, G.A. Ummarino, V.A. Stepanov, J. Jun, S.M. Kazakov, J. Karpinski
    “Point-contact spectroscopy in MgB2 single crystal in magnetic field”, Physica C, 385, 255 – 263, (2003). pdf

  6. R.S. Gonnelli, D. Daghero, G.A. Ummarino, V.A. Stepanov, J. Jun, S.M. Kazakov, J. Karpinski
    “Independent determination of the two gaps by directional point-contact spectroscopy in MgB2 single crystals”, Superconductor: Science and Technology, 16, 171- 175, (2003). pdf

2002

  1. D. Daghero, P. Mazzetti, A. Stepanescu, P. Tura, A. Masoero
    "Electrical anisotropy in high-Tc granular superconductors in a magnetic field", Phys. Rev. B 66, 184514 (2002). pdf

  2. R.S. Gonnelli, D. Daghero, G.A. Ummarino, V.A. Stepanov, J. Jun, S.M. Kazakov, J. Karpinski
    “Direct evidence for two-band superconductivity in MgB2 single crystal from directional point-contact spectroscopy in magnetic field”, Phys. Rev. Lett., 89, 247004, (2002). pdf

  3. R.S. Gonnelli, A. Calzolari, D. Daghero, G.A. Ummarino, V.A. Stepanov, P. Fino, G. Giunchi, S. Ceresara, G. Ripamonti
    “Temperature and junction-type dependency of Andreev reflection in MgB2”, Journal of Physics and Chemistry of Solids, 63/12, 2319-2323, (2002). pdf

  4. R.S. Gonnelli, A. Calzolari, D. Daghero, L. Natale, G.A. Ummarino, V.A. Stepanov, M. Ferretti
    “Doping dependence of the superconducting gap by Andreev reflection in Au/La2-x SrxCuO4 point-contact junctions”, Journal of Physics and Chemistry of Solids, 63/12, 2369-2373, (2002). pdf

  5. R.S. Gonnelli, A. Calzolari, D. Daghero, G.A. Ummarino, V.A. Stepanov, G. Giunchi
    “Josephson effect in MgB2 break junctions”, Highlights INFM, 56-58, (2000-2001). pdf

  6. G.A. Ummarino, R.S. Gonnelli
    "The possible explanation of electric-field-doped C60 phenomenology in the framework of Eliashberg theory", Physical Review B 66, 104514, (2002). pdf

  7. G.A. Ummarino, R.S. Gonnelli, D. Daghero
    "Eliashberg equations and the phenomenology of field-effect-doped C60", International Journal of Modern Physics B, 16, 1539-1546, (2002).

  8. R.S. Gonnelli, G.A. Ummarino, D. Daghero, A. Calzolari, V.A. Stepanov
    “Gap measurements in MgB2 break-junction and point-contact heterostructures: test of the two-band models”, International Journal of Modern Physics B, 16, 1553-1561, (2002).

  9. G.A. Ummarino, R.S. Gonnelli, D. Daghero
    “Tunneling conductance of SIN junctions with different gap symmetries and non-magnetic impurities by direct solution of real-axis Eliashberg equations”, Physica C, 377, 292-303, (2002). pdf

2001

  1. R.S. Gonnelli, A. Calzolari, D. Daghero, L. Natale, G.A. Ummarino, V.A STtepanov, M. Ferretti
    “Evidence for pseudogap and phase-coherence gap separation by Andreev reflection experiments in Au/La2-xSrxCuO4 point-contact junctions”, European Physical Journal B (Rapid Notes) 22, 411-414, (2001). pdf

  2. R.S. Gonnelli, A. Calzolari, D. Daghero, G.A. Ummarino, V.A STtepanov, G. Giunchi, S. Ceresara, G. Ripamonti
    “Josephson effect in MgB2 break junctions”, Physical Review Letters, 87, 97001, (2001). pdf

  3. E. Cappelluti, C. Grimaldi, L. Pietronero, S. Strassler, G.A. Ummarino
    "Superconductivity of Rb3C60: breakdown of the Migdal-Eliashberg theory ", European Physical Journal B, 21, 383-391, (2001). pdf

2000

  1. R.S. Gonnelli, A. Calzolari, D. Daghero, L. Natale, G.A. Ummarino, V.A STtepanov, M. Ferretti
    "Temperature and doping dependence of Andreew reflection in Au/ La2-xSrxCuO4 point-contact junctions ", International Journal of Modern Physics B, 14, 3472-3479, (2000).

  2. D. Daghero, R.S. Gonnelli, A. Morello, G.A. Ummarino, L. Natale, V.A. Stepanov, Francesca Licci, G. Ubertalli
    "Possible evidence charge stripe ordering in the ab-plane resistivity of strongly underdoped La2-xSrxCuO4 single crystals. ", International Journal of Modern Physics B, 14, 2779-2784, (2000).pdf

  3. R.S. Gonnelli, V.A. Stepanov, A. Morello, G.A. Ummarino, G. Behr, G. Graw, S.V. Shulga, S. L. Drechsler
    "Electron-phonon coupling origin of the resistivity in YNi2B2C single crystals ", International Journal of Modern Physics B, 14, 2840-2845, (2000).

  4. G.A. Ummarino, R.S. Gonnelli, D. Daghero
    "Real-axis solution of Eliashberg equations in various order-parameter symmetries and the tunneling conductance of optimally-doped HTCS", International Journal of Modern Physics B, 14, 2944-2949, (2000).

  5. G.A. Ummarino, R.S. Gonnelli, D. Daghero
    "Solution of real-axis Eliashberg equations with different pair symmetries and tunneling density of states ", Physica C, 341-348, 299-300, (2000). pdf

  6. G.A. Ummarino, R.S. Gonnelli
    "s- and d-wave solution of Eliashberg equations with finite bandwidth", Physica C, 341-348, 295-296, (2000). pdf

  7. R.S. Gonnelli, V.A. Stepanov, A. Morello, G.A. Ummarino, G. Behr, G. Graw, S.V. Shulga, S. L. Drechsler
    " Resistivity and electron-phonon coupling in YNi2B2C single crystals", Physica C, 341-348, 1957-1958, (2000). pdf

  8. R.S. Gonnelli, V.A. Stepanov, A. Morello, G.A. Ummarino, D. Daghero, L. Natale, Francesca Licci, G. Ubertalli
    "ab-plane resistivity and possible charge stripe ordering in strongly underdoped La2-xSrxCuO4 single crystals ", Physica C, 341-348, 1779-1780, (2000). pdf

  9. G.A. Ummarino, R.S. Gonnelli
    "d-wave solution of Eliashberg equations and tunneling density of states in optimally-doped high-Tc superconductors ", “Stripes and related phenomena”, edited by A. Bianconi and N.L. Saini (Kluwer Academic/ Plenum Publisher), 407, (2000).

  10. R.S. Gonnelli, G.A. Ummarino, V.A. Stepanov
    "The quasiparticle density of states of optimally-doped Bi 2212: break-junction vs. vacuum tunneling measurements", “Stripes and related phenomena”, edited by A. Bianconi and N.L. Saini (Kluwer Academic/ Plenum Publisher) 377, (2000).

  11. D. Daghero, A. Masoero, P. Mazzetti, A. Stepanescu
    “Anisotropy of the electrical resistance in high-Tc granular superconductors under magnetic field”, Physica C 341-348, 1869 (2000). pdf

  12. D. Daghero, A. Masoero, P. Mazzetti, A. Stepanescu, P. Tura
    “Conductance anisotropy in granular high-Tc superconductors in a magnetic field”, Philosophical Magazine B 80, 1039 (2000).

Since 1994

  1. R.S. Gonnelli
    "Atomic force microscopy in the surface characterization of semiconductors and superconductors", Philosophical Magazine B, N. 80 (2000), p. 599-609.
  2. E. Monticone, A.M. Rossi, M. Rajteri, R.S. Gonnelli, V. Lacquaniti, G. Amato
    "Structural and morphological properties of evaporated SiOx films", Philosophical Magazine B, N. 80 (2000), p. 523-529.
  3. A. Morello, A.G.M. Jansen, R.S. Gonnelli, S.I. Vedeneev
    "3D-melting features of the irreversibility line in overdoped Bi2Sr2CuO6 at ultra-low temperature and high magnetic field", Physica C, 341-348 (2000), p. 1421-1422.
  4. A. Morello, A.G.M. Jansen, R.S. Gonnelli, S.I. Vedeneev
    "Irreversibility line in overdoped Bi2+xSr2-(x+y)Cu1+yO6±d at ultra-low temperature and high magnetic field", Phys. Rev. B 61, (2000), p. 9113-9117.
  5. R.S. Gonnelli, V.A. Stepanov, A. Morello, G.A. Ummarino, G. Behr, G. Graw, S.V. Shulga, S. L. Drechsler
    "Resistivity and electron-phonon coupling in YNi2B2C single crystals", Physica C, 341-348, 1957-1958, (2000).
  6. G.A. Ummarino, R.S. Gonnelli
    "s- and d-wave solution of Eliashberg equations with finite bandwidth", Physica C, 341-348, 295-296, (2000).
  7. G.A. Ummarino, R.S. Gonnelli, D. Daghero
    "Solution of real-axis Eliashberg equations with different pair symmetries and tunneling density of states ", Physica C, 341-348, 299-300, (2000).
  8. G.A. Ummarino, R.S. Gonnelli, D. Daghero
    "Real-axis solution of Eliashberg equations in various order-parameter symmetries and the tunneling conductance of optimally-doped HTcS", International Journal of Modern Physics B, accepted.
  9. R.S. Gonnelli, V.A. Stepanov, A. Morello, G.A. Ummarino, G. Behr, G. Graw, S.V. Shulga, S. L. Drechsler
    "Electron-phonon coupling origin of the resistivity in YNi2B2C single crystals ", International Journal of Modern Physics B, accepted.
  10. R.S. Gonnelli, V.A. Stepanov, A. Morello, G.A. Ummarino, D. Daghero, L. Natale, Francesca Licci, G. Ubertalli
    "Possible evidence charge stripe ordering in the ab-plane resistivity of strongly underdoped La2-xSrxCuO4 single crystals", International Journal of Modern Physics B, accepted.
  11. R.S. Gonnelli, A. Calzolari, D. Daghero, L. Natale, G.A. Ummarino, V.A. Stepanov , M. Ferretti
    "Temperature and doping dependence of Andreew reflection in Au/ La2-xSrxCuO4 point-contact junctions ", International Journal of Modern Physics B, 14, 3472-3479, (2000).
  12. R.S. Gonnelli, G.A. Ummarino, V.A. Stepanov
    "The quasiparticle density of states of optimally-doped Bi 2212: break-junction vs. vacuum tunneling measurements", "Stripes and related phenomena", edited by A. Bianconi and N.L. Saini (Kluwer Academic/ Plenum Publisher) 377, (2000).
  13. G.A. Ummarino, R.S. Gonnelli
    "d-wave solution of Eliashberg equations and tunneling density of states in optimally-doped high-Tc superconductors ", "Stripes and related phenomena", edited by A. Bianconi and N.L. Saini (Kluwer Academic/ Plenum Publisher), 407, (2000).
  14. R.S. Gonnelli, V.A. Stepanov, A. Morello, G.A. Ummarino, D. Daghero, L. Natale, Francesca Licci, G. Ubertalli
    "Anomalies in the ab-plane resistivity of strongly underdoped La2-xSrxCuO4 single crystals: possible charge stripe ordering? ", Physica C, 341-348, 1779-1780, (2000).
  15. G.A. Ummarino, R.S. Gonnelli
    "Real-axis direct solution of the d-wave Eliashberg equations and the tunneling density of states in optimally doped Bi2Sr2CaCu2O8+x", Physica C, 328, 189-194, (1999).
  16. R.S. Gonnelli, G.A. Ummarino, V.A. Stepanov
    "Eliashberg equations, pair symmetry and tunneling density of states in high-Tc layered superconductors", Physica C, 317-318, 378-382, (1999).
  17. G.A. Ummarino, R.S. Gonnelli
    "Some consequences of the breakdown of Migdal's Theorem in high-Tc superconductors", Physica C, 317-318, 524-527, (1999).
  18. G.A. Ummarino, R.S. Gonnelli
    "The effects of the breakdown of Migdal's Theorem in various superconductors ", International Journal of Modern Physics B, vol. 13, n. 9&10, 1215-1220, (1999).
  19. G.A. Ummarino, R.S. Gonnelli, C. Bravi, Masumi Inoue
    "Pair symmetry and degree of gap depression at S-I interfaces in HTS Josephson junctions", International Journal of Modern Physics B, vol. 13, n. 9&10, 1301-1306, (1999).
  20. G.A. Ummarino, R.S. Gonnelli
    "d-wave solution of Eliashberg equations and tunneling density of states in optimally-doped high-Tc superconductors ", "Stripes and related phenomena", edited by A. Bianconi and N.L. Saini (Kluwer Academic/ Plenum Publisher), 407, (2000).
  21. R.S. Gonnelli, G.A. Ummarino, V.A. Stepanov
    "The quasiparticle density of states of optimally-doped Bi 2212: break-junction vs. vacuum tunneling measurements", "Stripes and related phenomena", edited by A. Bianconi and N.L. Saini (Kluwer Academic/ Plenum Publisher) 377, (2000).
  22. R.S. Gonnelli, G.A. Ummarino, V.A. Stepanov
    "Reproducible tunneling determination of the electron-phonon spectral function in optimally-doped Bi-2212 single crystal break-junctions", Journal of Physics and Chemistry of Solids, Vol. 59 10-12 ,2058-2061, (1998).
  23. G.A. Ummarino, R.S. Gonnelli
    "Breakdown of Migdal's Theorem and intensity of electron-phonon coupling in high-Tc superconductors", Phys. Rev. B - Rapid Comm., 56, R14279-R14283, (1997).
  24. G.A. Ummarino, R.S. Gonnelli, C. Bravi, V.A. Stepanov
    "Intrinsic surface depression of the order parameter under mixed (s+id)-wave pair symmetry and its effect on the critical current of high-Tc SIS Josephson junctions", Journal of Superconductivity, 10, 657-662, (1997).
  25. R.S. Gonnelli, G.A. Ummarino, C. Bravi, V.A. Stepanov
    "The role of the pair symmetry and intrinsic surface depression of the order parameter on the critical current of high-Tc SIS and SIS' Josephson junctions", Physica C, 282-287, 2403-2404, (1997).
  26. R.S. Gonnelli, G.A. Ummarino, V.A. Stepanov
    "Tunneling spectroscopy in Bi2Sr2CaCu2O8+x single cristal break-junctions: reproducible determination of the Eliashberg function and role of the breakdown of Migdal's Theorem", Physica C, 282-287, 1473-1474, (1997).
  27. G.A. Ummarino, R.S. Gonnelli, V.A. Stepanov
    "Energy dependence of the normal density of states and of electron-phonon spectral function in the quasiparticle tunneling in high-Tc superconductors", Physica C, 282-287, 1501-1502, (1997).
  28. G.A. Ummarino, R.S. Gonnelli, V.A. Stepanov
    "Eliashberg equations with energy dependence of the normal density of states and quasiparticle tunneling in high-Tc superconductors", Il Nuovo Cimento 19 D, 1215-1221, (1997).
  29. R.S. Gonnelli, G.A. Ummarino, C. Bravi, V.A. Stepanov
    "Influence of surface-depressed order parameter and pair symmetry in the critical current of high-Tc Josephson junctions", Il Nuovo Cimento 19 D, 1207-1214, (1997).
  30. R.S. Gonnelli, D. Puttero, G.A. Ummarino, C. Bravi
    "Surface depression of the order parameter and pair symmetry in the Josephson critical current of high-Tc SIS' and SIS junctions", IEEE Trans. on Appl. Supercond., 7, 3331-3334, (1997).
  31. R.S. Gonnelli, G.A. Ummarino, V.A. Stepanov
    "Determination of the tunneling electron-phonon spectral function in high-Tc superconductors with energy dependence of the normal density of states", Physica C, 275, 162-171, (1997).
  32. R.S. Gonnelli, G.A. Ummarino
    "Surface order-parameter depression and pair symmetry in high-Tc Josephson junctions", Mod. Phys. Lett. B No.16, 753-763, (1996).
  33. R.S. Gonnelli, D. Puttero, G.A. Ummarino
    "The intrinsic determinants of the critical current in SIS' and SIS high-Tc Josephson junctions", Appl. Phys. Lett., 68 (17), 2433-2435, (1996).
  34. R.S. Gonnelli, D. Puttero, G.A. Ummarino
    "The critical current of SIS and SIS' high-Tc Josephson junctions with a surface-depressed order parameter", Proceedings of the European Conference on Applied Superconductivity, EUCAS'95, Edinburgh, Inst. Phys. Conf. Ser., No 148, 1351-1354, (1995).
  35. R.S. Gonnelli, D. Puttero, G.A. Ummarino, V.A. Stepanov
    "Temperature dependence of the Josephson critical current in Bi2Sr2CaCu2O8+x break junctions", IEEE Transaction on Applied Superconductivity, 5, 2539-2542, (1995).
  36. R.S. Gonnelli, D. Puttero, G.A. Ummarino, V.A. Stepanov, Francesca Licci
    "Influence of a surface-depressed order parameter on the Josephson critical current in Bi2Sr2CaCu2O8+x nonhysteretic break junctions", Phys. Rev. B 51, 12782-12785, (1995).
  37. R.S. Gonnelli, D. Puttero, G.A. Ummarino, V.A. Stepanov
    "The role of the surface depression of the pair potential on the Josephson and quasi-particle tunneling in high-Tc superconductors", Il Nuovo Cimento, 16 D, 1979-1985, (1994).
  38. R.S. Gonnelli, O.V. Dolgov, G.A. Ummarino, S.I. Vedeneev
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