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Published June 3, 2002 | Version Published
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Strongly correlated s-wave superconductivity in the N-type infinite-layer cuprate

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Abstract

Quasiparticle tunneling spectra of the electron-doped (n-type) infinite-layer cuprate Sr0.9La0.1CuO2 reveal characteristics that counter a number of common phenomena in the hole-doped (p-type) cuprates. The optimally doped Sr0.9La0.1CuO2 with T-c = 43 K exhibits a momentum-independent superconducting gap Delta = 13.0 +/- 1.0 meV that substantially exceeds the BCS value, and the spectral characteristics indicate insignificant quasiparticle damping by spin fluctuations and the absence of pseudogap. The response to quantum impurities in the Cu sites also differs fundamentally from that of the p-type cuprates with d(x2-y2)-wave pairing symmetry.

Additional Information

© 2002 The American Physical Society. Received 17 November 2001; published 16 May 2002. The research at Caltech was supported by NSF Grant No. DMR-0103045 and the Caltech President's Fund. Part of the work was performed by the Center for Space Microelectronics Technology, Jet Propulsion Laboratory, and was sponsored by NASA. The work at Pohang University was supported by the Ministry of Science and Technology of Korea through the Creative Research Initiative Program.

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Eprint ID
861
Resolver ID
CaltechAUTHORS:CHEprl02

Related works

Describes
http://arxiv.org/abs/cond-mat/0206255 (URL)

Funding

NSF
DMR-0103045
Caltech President's Fund
NASA/JPL
Ministry of Science and Technology (Korea)

Dates

Created
2005-10-31
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Updated
2023-06-01
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