Abstract
Characteristic power-law dependence of junction conductance on temperature was confirmed at low temperatures fora,b-axis oriented Au/PrBa2Cu3O7−x /YBa2Cu3O7−y junctions with a PrBa2Cu3O7−x layer thinner than 30 nm, indicating that current transport via a small number of localized states was predominant. The radius and the density of the localized states were estimated to be 1.1 nm and 5.0x1019 eV−1 cm−3, respectively. Transport measurement at 1.7 K in a magnetic field of up to 6 T revealed no indication of on-site Coulomb repulsion of electrons in the localized states. These results support the possibility of resonant tunneling of Cooper pairs in superconductor-insulator-superconductor junctions with a thin PrBa2Cu3O7−x tunnel barrier.
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References
T. Hashimoto, M. Sagoi, Y. Mizutani, J. Yoshida, and K. Mizushima.Appl. Phys. Lett. 60, 1756 (1992).
Y. Suzuki, J.-M. Triscon, C. B. Eom, M. R. Beasley, and T. H. Geball,Phys. Rev. Lett.,73, 328 (1994)
J. Yoshida, T. Nagano, and T. Hashimoto,Phys. Rev. B 53, 8623 (1996).
Yu Boguslavskij, J. Gao, A. J. H. M. Rijnders, D. Terpstra, G. J. Gerritsma, and H. Rogalla,Physica C 194, 268 (1992).
J. Halbritter,Phys. Rev B 46, 14861 (1992).
I. A. Devyatov and M. Yu Kupriyanov,JETP Lett. 59, 200 (1994).
T. Nagano, T. Hashimoto, and J. Yoshida,Physica C 265, 214 (1996)
L. I. Glazman and K. A. Matveev,Sov. Phys. JETP 67, 1276 (1988).
L. I. Glazman and K. A. Matveev,JETP Lett. 48 (1988) 445.
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Yoshida, J., Nagano, T. & Hashimoto, T. Characterization of localized states in thin PrBa2Cu3O7−x tunnel barriers. J Low Temp Phys 106, 327–332 (1997). https://doi.org/10.1007/BF02399634
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DOI: https://doi.org/10.1007/BF02399634