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Phys. Rev. Lett. 82, 5345–5348 (1999)

Interlayer Transport of Quasiparticles and Cooper Pairs in Bi2Sr2CaCu2O8+δ Superconductors

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Yu. I. Latyshev* and T. Yamashita
Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan

L. N. Bulaevskii1, M. J. Graf2, A. V. Balatsky1,2, and M. P. Maley3
1Theory Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
2Center for Materials Science, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
3Superconductivity Technology Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

Received 12 March 1999; published in the issue dated 28 June 1999

We study the c-axis transport of stacked, intrinsic junctions in Bi2Sr2CaCu2O8+δ single crystals, fabricated by the double-sided ion beam processing technique from single crystal whiskers. Measurements of the I-V characteristics of these samples allow us to obtain the temperature and voltage dependence of the quasiparticle c-axis conductivity in the superconducting state, the Josephson critical current, and the superconducting gap. We show that the BCS d-wave model in the clean limit for resonant impurity scattering, with a significant contribution from coherent interlayer tunneling, describes satisfactorily the low temperature and low energy c-axis transport of both quasiparticles and Cooper pairs.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.5345
DOI:
10.1103/PhysRevLett.82.5345
PACS:
74.25.Fy, 74.50.+r, 74.72.Hs

*Permanent address: Institute of Radio Engineering and Electronics RAS, 11 Mokhovaya, 103907 Moscow, Russia.

 
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