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Strongly correlated s-wave pairing in the n-type infinite-layer cuprate | | C.-T. Chen
; P. Seneor
; N.-C. Yeh
; R. P. Vasquez
; L. D. Bell
; C. U. Jung
; J. Y. Kim
; Min-Seok Park
; Heon-Jung Kim
; Sung-Ik Lee
; | | Date: |
14 Jun 2002 | | Journal: | Phys. Rev. Lett. 88, 227002 (2002) | | Subject: | Superconductivity | cond-mat.supr-con | | Abstract: | Quasiparticle tunneling spectra of the electron-doped (n-type) infinite-layer cuprate Sr_{0.9}La_{0.1}CuO_2 reveal characteristics that counter a number of common phenomena in the hole-doped (p-type) cuprates. The optimally doped Sr_{0.9}La_{0.1}CuO_2 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_{x^2-y^2}-wave pairing symmetry. | | Source: | arXiv, cond-mat/0206255 | | Services: | Forum | Review | PDF | Favorites | |
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