Superconducting gap anisotropy in Nd1.85Ce0.15CuO4: results from photoemission.
نویسندگان
چکیده
We have performed angle resolved photoelectron spectroscopy on the electron doped cuprate superconductor Nd1.85Ce0.15CuO4. A comparison of the leading edge midpoints between the superconducting and normal states reveals a small, but finite shift of 1.5-2 meV near the ( pi,0) position, but no observable shift along the zone diagonal near ( pi/2, pi/2). This is interpreted as evidence for an anisotropic superconducting gap in the electron doped materials, which is consistent with the presence of d-wave superconducting order in this cuprate superconductor.
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ورودعنوان ژورنال:
- Physical review letters
دوره 86 6 شماره
صفحات -
تاریخ انتشار 2001