Non-free-electron momentum- and thickness-dependent evolution of quantum well states in the Cu/Co/Cu(001) system
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Non-free-electron momentum- and thickness-dependent evolution of quantum well states in the Cu/Co/Cu(001) system

  • Author(s): Rotenberg, Eli
  • Wu, Y.Z.
  • An, Joonhee M.
  • Van Hove, Michel A.
  • Canning, Andrew
  • Wang, Lin-Wang
  • Qiu, Z.Q.
  • et al.
Abstract

We present systematic $k_ \parallel $-dependent measurements of the Fermi surface and underlying bandstructure of quantum well states in Cu/Co/Cu(001). Compared to bands from normal emission, we find a complicated evolution of "split" QW states as a function of the thicknesses of both the copper overlayer and the cobalt barrier layer. Self-consistent calculations show that the penetration of the quantum well states into the cobalt barrier layer is significant and leads to the observed very non-free-electron behavior of these states.

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