Abstract
We have fabricated nanobridges from YBa2Cu3O7 films deposited on LaAlO3 substrates by using a focused ion beam technique and studied their superconducting transition properties with and without a twin boundary (TB) crossing the bridge. The nanobridge dimensions were 200–500 nm in width and length, and 100 nm in thickness. All the nanobridges studied with or without a TB had a superconducting transition temperature T c of 90 K with a zero-resistance transition at 86.5 K and high critical current density of ∼1 × 107 A/cm2 at 77 K. However, the current-voltage curves for the nanobridges with a TB showed Josephson tunneling characteristics near the transition, which is in clear contrast to the flux-flow-type transition behavior of those without a TB. According to a crystallographic analysis with d-wave symmetry of YBCO, the small mismatch angle of the TB itself was not sufficient to cause the Josephson effect. Secondary effects, such as stress and strain, are believed to be the origin.
Similar content being viewed by others
References
D. Dimos, P. Chaudhari, J. Mannhart and F. K. Le-Goues, Phys. Rev. Lett. 61, 219 (1988).
D. Koelle, A. H. Miklich, E. Dantsker, F. Ludwig, D. T. Nemeth and J. Clarke, Appl. Phys. Lett. 63, 2271 (1993); J. Beyer, D. Drung, F. Ludwig, T. Minotani and K. Enpuku, Appl. Phys. Lett. 72, 203 (1998).
L. P. Lee, K. Char, M. S. Colclough and G. Zaharchuk, Appl. Phys. Lett. 59, 3051 (1991).
S. G. Lee and Y. Hwang, Appl. Phys. Lett. 76, 2755 (2000).
Y. Chong, B. Ruck, R. Dittmann, C. Horstmann, A. Engelhardt, G. Wahl, B. Oelze and E. Sodtke, Appl. Phys. Lett. 72, 1315 (1998); G. Testa, A. Monaco, E. Esposito, E. Sarnelli, D-J. Kang, S. H. Mennema, E. J. Tarte and M. G. Blamire, Appl. Phys. Lett. 85, 1202 (2004).
A. Kaestner, M. Volk, F. Ludwig, M. Schilling and J. Menzel, Appl. Phys. Lett. 77, 3057 (2000).
C. B. Eom, A. F. Marshall, S. S. Laderman, R. D. Jacowitz and T. H. Geballe, Science 249, 1549 (1991).
C. L. Jia, B. Kabius, K. Urban, K. Hermann, J. Schubert, W. Zander and A. I. Braginski, Physica C 196, 211 (1992).
J. Mannhart, H. Hilgenkamp, B. Mayer, Ch. Gerber, J. R. Kirtley, K. A. Moler and M. Sigrist, Phys. Rev. Lett. 77, 2782 (1996).
J. R. Wendt et al., J. Vac. Sci. Technol. B 12, 3607 (1994).
M. V. Pedyash, D. H. A. Blank and H. Rogalla, Appl. Phys. Lett. 68, 1156 (1996).
Z. -X. Ye, Q. Li, Y. Hu, W. D. Si, P. D. Johnson and Y. Zhu, Appl. Phys. Lett. 87, 122502 (2005).
S. H. Lee, J.-H. Choi and S. G. Lee, J. Appl. Phys. 111, 063914 (2012).
R. J. Cava, B. Batlogg, C. H. Chen, E. A. Rietman, S. M. Zahurak and D. Werder, Phys. Rev. B 37, 7426 (1987).
K. A. Gschneidner, Jr., J.-C. G. Bünzli and V. K. Pecharsky, Handbook on the Physics and Chemistry of Rare Earths (North-Holland, Amsterdam, 2009), Vol. 39, p. 126.
S. G. Lee, S. H. Hong, W. N. Kang and D. H. Kim, J. Appl. Phys. 105, 013924 (2009).
S. G. Lee, S. H. Hong, W. K. Seong and W. N. Kang, Appl. Phys. Lett. 95, 202504 (2009).
S. Bueble, K. Knorr, E. Brecht and W. W. Schmahl, Surf. Sci. 400, 345 (1998).
V. Ambegaokar and A. Baratoff, Phys. Rev. Lett. 10, 486 (1963); erratum 11, 104 (1963).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Lee, S.H., Lee, SG. & Choi, JH. Comparison of the superconducting transition properties of YBa2Cu3O7 nanobridges with and without a twin boundary. Journal of the Korean Physical Society 62, 99–103 (2013). https://doi.org/10.3938/jkps.62.99
Received:
Published:
Issue Date:
DOI: https://doi.org/10.3938/jkps.62.99