Structural and electronic properties of the Bi/Au(110)-1x4 surface

We report on the structural and electronic properties of the Bi/Au(110)-1 x 4 surface, by combining scanning tunneling microscopy, angle-resolved photoemission spectroscopy, and first-principles calculations. The analysis of the precursor 1 x 8 moire structure shows that the 1 x 4 reconstruction forms at an optimum coverage of one monolayer. A hard-sphere model is proposed for the 1 x 4 structure and further confirmed by calculations. In this model, topmost Bi atoms form rows supported by a Bi overlayer, with no significant alloying with the substrate. This has important consequences regarding the electronic properties and the spin texture. The photoemission measurements evidence typical p Bi-induced states, that can have either quasi-one-or two-dimensional character depending on their binding energy. These states show no Rashba spin splitting, in agreement with the results of first-principles calculations. This finding is discussed by considering the role of hybridization with the substrate in the emergence of the Rashba effect.

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Physical Review B, 88, 19
College Pk, American Physical Society

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 Record created 2014-01-09, last modified 2020-08-28

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