| Issue |
Europhys. Lett.
Volume 69, Number 2, January 2005
|
|
|---|---|---|
| Page(s) | 263 - 269 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2003-10315-8 | |
| Published online | 17 December 2004 | |
Bulk evidence for 
-wave pairing symmetry
in electron-doped infinite-layer cuprate
1
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: hhwen@aphy.iphy.ac.cn
Received:
14
October
2003
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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