Volume 69, Number 2, January 2005
|Page(s)||263 - 269|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||17 December 2004|
Bulk evidence for -wave pairing symmetry in electron-doped infinite-layer cuprate
National Laboratory for Superconductivity, Institute of Physics Chinese Academy of Sciences - P.O. Box 603, Beijing 100080, PRC
2 National Creative Research Initiative Center for Superconductivity and Department of Physics, Pohang University of Science and Technology Pohang 790-784, Republic of Korea
Corresponding author: firstname.lastname@example.org
Accepted: 8 November 2004
The low-temperature specific heat of electron-doped (n-type) infinite-layer cuprate superconductor was measured. The quasiparticle density of states (DOS) in the mixed state is found to be consistent with the predictions of the s-wave pairing symmetry, and agree very well with the earlier results from tunnelling measurement. This is contrary to the prediction of d-wave symmetry, which has been confirmed for the hole-doped (p-type) cuprates. Our results indicate that the electronic DOS in the mixed state are mainly contributed by the vortex core area in the present sample.
PACS: 74.20.Rp – Pairing symmetries (other than s-wave) / 74.25.Bt – Thermodynamic properties / 74.72.Dn – La-based cuprates
© EDP Sciences, 2005
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