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A reconstruction of (001) studied by low-energy electron diffraction and soft x-ray photoemission spectroscopy
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Image of FIG. 1.
FIG. 1.

LEED patterns of the (001) surface (a) after decapping taken at a primary electron energy of , (b) after preparation step C at , (c) after preparation step D at . The pattern symmetry in (b) corresponds to a superposition of and , whereas in (c) to , which is illustrated schematically in (d).

Image of FIG. 2.
FIG. 2.

, , and core-level spectra of a mixed surface structure . The spectra were excited by (left panel) and (right panel), whereas both the and and (left panel) and , (right panel). Due to the variation of the photoelectron mean free path with the excitation energy, the surface components have a higher relative intensity on the left panels. The intensity ratio of the residuum to the measured peaks lies in the range of 0.02 to 0.06.

Image of FIG. 3.
FIG. 3.

Structure model of the (001) surface with the unit cell as implied by the respective LEED pattern. According to the interpretation model, the surface is terminated with Se dimers, and Cu and In adatoms .


Generic image for table
Table I.

Preparation steps for the (001) surface with corresponding LEED pattern.

Generic image for table
Table II.

Fitting parameters for the , , and core-level spectra.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A (4×2) reconstruction of CuInSe2 (001) studied by low-energy electron diffraction and soft x-ray photoemission spectroscopy