Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session T60: Poster Session III
Thursday, March 8, 2018
LACC Room: West Hall A
Abstract: T60.00331 : First-principles Wannier Function Approach to Rashba Effect
In various two-dimensional electronic systems, Rashba effect arises due to the spin-orbit interaction. Rashba coefficients αR, strength coefficients of Rashba effect, are key ingredients to spintronic applications such as spin-to-charge conversion . However, it is not clear what determines αR. For example, the trend of αR for M(111) surfaces (M = Cu, Ag, Au) is Au(111) > Cu(111) > Ag(111), but this trend doesn’t coincide with that of atomic SOC strength, that is, the order of atomic number. In this study, we have performed first-principles density functional calculations for typical Rashba systems such as M(111) surfaces, Bi/M surface alloys  and oxide interfaces , and focused on what dominates αR in terms of the localization length and Wannier center for Rashba states. We will discuss the correlation between αR and the localization length or Wannier center of Rashba states.
 J. C. Rojas Sánchez et al., Nat. Commun. 4, 2944 (2013).
 N. Yamaguchi, H. Kotaka and F. Ishii, J. Cryst. Growth, 468, 688 (2017).
 N. Yamaguchi and F. Ishii, to be published in Appl. Phys. Express, arXiv:1709.08335.
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