Dual Nature of the Electronic Structure of the Stripe Phase
X. J. Zhou, T. Yoshida, S. A. Kellar, P. V. Bogdanov, E. D. Lu, A. Lanzara, M. Nakamura, T. Noda, T. Kakeshita, H. Eisaki, S. Uchida, A. Fujimori, Z. Hussain, Z. -X. Shen
Abstract
High resolution angle-resolved photoemission measurements have been carried out on (La1.4-xNd0.6Srx)CuO4, a model system with static stripes, and (La1.85Sr0.15)CuO4, a high temperature superconductor (Tc=40K) with dynamic stripes. In addition to the straight segments near (pi, 0) and (0, pi) antinodal regions, we have identified the existence of nodal spectral weight and its associated Fermi surface in the electronic structure of both systems. The ARPES spectra in the nodal region show well-defined Fermi cut-off, indicating a metallic character of this charge-ordered state. This observation of nodal spectral weight, together with the straight segments near antinodal regions, reveals dual nature of the electronic structure of the stripes due to the competition of order and disorder.
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