Phys. Rev. B 57, R11101–R11104 (1998)Evidence for a second one-dimensional set of states shedding light on the normal phase of high-Tc superconductors
We have identified a set of electronic states with a one-dimensional dispersion in the Γ=(0,0) to M1=(π,0) direction crossing the Fermi surface at one point kF=0.2±0.03π by angle-resolved photoemission. The one-dimensional character of these electronic states is demonstrated by missing dispersion along the orthogonal direction, observed in energy-distribution curves, and by k-space mapping of the Fermi surface, using angle scanning photoemission. The observed electronic states beyond the well-known large Fermi surface provoke the models based on charge and spin ordering in the CuO2 plane of high-Tc superconductors. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.57.R11101
DOI:
10.1103/PhysRevB.57.R11101
PACS:
74.72.Hs, 79.60.Bm
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