Journal
PHYSICAL REVIEW B
Volume 80, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.113309
Keywords
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Funding
- Ministry of Education, Culture, Sports, Science, and Technology of Japan [B-09]
- Grants-in-Aid for Scientific Research [21340083] Funding Source: KAKEN
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We have found a large spin splitting due to the Rashba spin-orbit interaction on the Bi/Ge(111)-(root 3 x root 3)R30 degrees surface by using angle-resolved photoelectron spectroscopy and first-principles electronic structure calculation. A surface resonance band derived from Bi exhibits the Rashba spin splitting with a large Rashba parameter (alpha(R)) of 1.8 eV angstrom. The spin-split states have a considerable 6s-6p(z) hybridized character, which leads to a strong perpendicular asymmetry of the charge density in close proximity of Bi nuclei. The result suggests that the magnitude of the Rashba splitting on Bi-adsorbed surfaces should depend crucially on the local-bonding geometry of Bi.
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