A nonmonotonic d(x2-y2) superconducting order parameter was revealed by low energy polarized electronic Raman scattering of the electron-doped superconductor Nd2-xCexCuO4 (NCCO). It had a maximum gap of 4.4 kBTc at Fermi surface intersections with an antiferromagnetic Brillouin zone. A smaller gap of 3.3 kBTc at fermionic Brillouin zone boundaries was also observed. The role of antiferromagnetic fluctuations and the similarity in the origin of superconductivity for electron and hole-doped cuprates were emphasized by the gap enhancement in the vicinity of the hot spots.
|Original language||English (US)|
|Number of pages||4|
|Journal||Physical Review Letters|
|State||Published - Mar 11 2002|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)