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Rigid band behavior of Nd2-xCexCuO4-y: A direct and inverse photoemission study

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
74
Issue
1
Identifiers
DOI: 10.1016/0038-1098(90)90204-o
Disciplines
  • Physics

Abstract

Abstract We have employed ultraviolet photoemission spectroscopy at hν = 21.2 and 40.8 eV and inverse photoemission spectroscopy at hν = 9.5 eV to study Nd 2- x Ce x CuO 4- y ( x = 0.0, 0.1, 0.15, 0.2). We observe a shift of the Fermi level to higher energies as a function of x. The total shift is 0.3 eV and saturates at x = 0.2. As suggested by existing band-structure calculations, this result seems to point to a rigid-band filling of the Ce-derived electrons in these “electron-doped” superconducting cuprates.

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