Anomalous electronic structure and pseudogap effects in Nd1.85Ce0.15CuO4.
We report a high-resolution angle-resolved photoemission spectroscopic study of the electron-doped ( n-type) cuprate superconductor Nd1.85Ce0.15CuO4. 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.
Armitage
N P
NP
Department of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, California 94305, USA.
Lu
D H
DH
Kim
C
C
Damascelli
A
A
Shen
K M
KM
Ronning
F
F
Feng
D L
DL
Bogdanov
P
P
Shen
Z X
ZX
Onose
Y
Y
Taguchi
Y
Y
Tokura
Y
Y
Mang
P K
PK
Kaneko
N
N
Greven
M
M