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Strongly correlated s-wave superconductivity in the N-type infinite-layer cuprate

Chen, C.-T. and Seneor, P. and Yeh, N.-C. and Vasquez, R. P. and Bell, L. D. and Jung, C. U. and Kim, J. Y. and Park, Min-Seok and Kim, Heon-Jung and Lee, Sung-Ik (2002) Strongly correlated s-wave superconductivity in the N-type infinite-layer cuprate. Physical Review Letters, 88 (22). Art. No. 227002. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:CHEprl02

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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.


Item Type:Article
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. http://arxiv.org/pdf/cond-mat/0206255
Subject Keywords:high-temperature superconductors, pairing symmetry, impurity atoms, states, BI2SR2CACU2O8+DELTA, SR0.9LA0.1CUO2, spectra, probe, ZN
Record Number:CaltechAUTHORS:CHEprl02
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:CHEprl02
Alternative URL:http://dx.doi.org/10.1103/PhysRevLett.88.227002
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:861
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:31 Oct 2005
Last Modified:18 Sep 2014 18:10

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