Angle-resolved photoemission investigation of the electronic band properties of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">YBa</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Cu</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">O</mi></mrow><mrow><mn>7</mn><mi mathvariant="normal">−</mi><mi mathvariant="normal">x</mi></mrow></msub></mrow></math>(001)

Y. Sakisaka; T. Komeda; T. Maruyama; M. Onchi; H. Kato; Y. Aiura; H. Yanashima; T. Terashima; Y. Bando; K. Iijima; K. Yamamoto; K. Hirata

doi:10.1103/PhysRevB.39.9080

Angle-resolved photoemission investigation of the electronic band properties of ${YBa}_{2}$ ${Cu}_{3}$ $O_{7 - x}$ (001)

Y. Sakisaka, T. Komeda, T. Maruyama, M. Onchi, H. Kato, Y. Aiura, H. Yanashima, T. Terashima, Y. Bando, K. Iijima, K. Yamamoto, and K. Hirata

Phys. Rev. B 39, 9080 – Published 1 May 1989

Abstract

The electronic energy-band properties of epitaxially grown ${YBa}_{2}$ ${CuO}_{3}$ $O_{7 - x}$ (001) single-crystal thin films have been investigated by angle-resolved ultraviolet photoemission spectroscopy (ARUPS) with synchrotron radiation as the light source. The (001) surfaces exhibit sharp (1×1) low-energy electron-diffraction patterns. Our ARUPS data show a clear Fermi edge and dispersive nature of the valence bands, suggesting the validity of the band concept for this oxide. We determined energy-band dispersion along the Γ-X-M-Γ directions in the bulk Brillouin zone. The experimental results are compared with the existing ground-state band calculations.