Ba 4d core-level spectroscopy in the <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>6.9</mn></mrow></msub></mrow></math> high-<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></mrow></math> superconductor: Existence of a surface-shifted component

R. Liu; C. G. Olson; A.-B. Yang; C. Gu; D. W. Lynch; A. J. Arko; R. S. List; R. J. Bartlett; B. W. Veal; J. Z. Liu; A. P. Paulikas; K. Vandervoort

doi:10.1103/PhysRevB.40.2650

Rapid Communication

Ba 4d core-level spectroscopy in the ${YBa}_{2}$ ${Cu}_{3}$ $O_{6.9}$ high- $T_{c}$ superconductor: Existence of a surface-shifted component

R. Liu, C. G. Olson, A.-B. Yang, C. Gu, D. W. Lynch, A. J. Arko, R. S. List, R. J. Bartlett, B. W. Veal, J. Z. Liu, A. P. Paulikas, and K. Vandervoort

Phys. Rev. B 40, 2650(R) – Published 1 August 1989

Abstract

Two sets of spin-orbit split Ba 4d core-level photoemission peaks were observed in a crystal of ${YBa}_{2}$ ${Cu}_{3}$ $O_{6.9}$ . From constant final-state measurements taken as a function of kinetic energy, the low-binding-energy doublet is identified as a surface component. Possible origins of the surface shift are discussed.