Higher-order contributions to the Rashba-Bychkov effect with application to the Bi/Ag(111) surface alloy

被引：120

作者：

Vajna, Sz ^{[1
]}

Simon, E. ^{[1
,2
]}

Szilva, A. ^{[1
]}

Palotas, K. ^{[1
]}

Ujfalussy, B. ^{[3
]}

Szunyogh, L. ^{[1
]}

机构：

[1] Budapest Univ Technol & Econ, Dept Theoret Phys, H-1111 Budapest, Hungary

[2] Eotvos Lorand Univ, Dept Phys, H-1518 Budapest, Hungary

[3] Hungarian Acad Sci, Inst Solid State Phys & Opt, Wigner Res Ctr Phys, H-1525 Budapest, Hungary

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 07期

关键词：

INITIO MOLECULAR-DYNAMICS; AU(111); METALS; STATES;

D O I：

10.1103/PhysRevB.85.075404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to explain the anisotropic Rashba-Bychkov effect observed in several metallic-surface-state systems, we use k . p perturbation theory with a simple group-theoretical analysis and construct effective Rashba Hamiltonians for different point groups up to third order in the wave number. We perform relativistic ab initio calculations for the (root 3 x root 3)R30 degrees Bi/Ag(111) surface alloy, and from the calculated splitting of the band dispersion we find evidence of the predicted third-order terms. Furthermore, we derive expressions for the corresponding third-order Rashba parameters to provide a simple explanation of the qualitative difference concerning the Rashba-Bychkov splitting of the surface states at Au(111) and Bi/Ag(111).

引用

页数：7

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