We report a high-resolution angle-resolved photoemission spectroscopic (ARPES) study of the electron-doped (n-type) cuprate superconductor Nd_1.85Ce_0.15CuO_4. We observe regions along the Fermi surface where the near-E_F intensity is suppressed and the spectral features are broad in a manner reminiscent of the high-energy ``pseudogap'' in the underdoped p-type (hole doped) cuprates. However, instead of occurring near the (pi, 0) region, as in the p-type materials, this pseudogap falls near the intersection of the underlying Fermi surface with the antiferromagnetic Brillouin zone boundary.
@article{arxiv.cond-mat/0107244,
title = {Anomalous electronic structure and pseudogap effects in Nd_1.85Ce_0.15CuO_4},
author = {N. P. Armitage and D. H. Lu and C. Kim and A. Damascelli and K. M. Shen and F. Ronning and D. L. Feng and P. Bogdanov and Z. -X. Shen and Y. Onose and Y. Taguchi and Y. Tokura and P. K. Mang and N. Kaneko and M. Greven},
journal= {arXiv preprint arXiv:cond-mat/0107244},
year = {2009}
}
Comments
5 pages, 3 figures, RevTex, submitted Phys. Rev. Lett. December 21, 2000