Phys. Rev. Lett. 81, 2108–2111 (1998)Electronic Structure of the √3×√3-α and 3×3 Periodicities of Sn/Ge(111)Received 23 April 1998; published in the issue dated 7 September 1998 Angle-resolved photoemission shows that the √3×√3 and the 3×3 surfaces have almost identical surface band structures with two dispersive bands, one of which crosses the Fermi level. The close resemblance between the electronic structures strongly points to a common atomic structure which is further supported by the two Sn 4d core-level components observed for both the √3×√3 and the 3×3 surfaces. The existence of two surface state bands on the √3×√3 surface calls for the reevaluation of the T4 model for Sn/Ge(111) and other related group IV adatom surfaces. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.2108
DOI:
10.1103/PhysRevLett.81.2108
PACS:
68.35.-p, 73.20.-r, 79.60.-i
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