Effects of spin-dependent electronic correlations on surface states in topological insulators

被引：2

作者：

Toklikishvili, Z. ^{[1
]}

Chotorlishvili, L. ^{[2
]}

Stagraczynski, S. ^{[3
]}

Dugaev, V. K. ^{[3
]}

Ernst, A. ^{[4
,5
]}

Barnas, J. ^{[6
,7
]}

Berakdar, J. ^{[2
]}

机构：

[1] Tbilisi State Univ, Fac Exact & Nat Sci, Chavchavadze Ave 3, Tbilisi 0128, Georgia

[2] Martin Luther Univ Halle Wittenberg, Dept Phys, D-06120 Halle, Germany

[3] Rzeszow Univ Technol, Dept Phys & Med Engn, PL-35959 Rzeszow, Poland

[4] Johannes Kepler Univ Linz, Inst Theroret Phys, Altenberger Str 69, A-4040 Linz, Austria

[5] Max Planck Inst Microstruct Phys, Weinberg 2, D-06120 Halle, Germany

[6] Adam Mickiewicz Univ, Fac Phys, Ul Uniwersytetu Poznanskiego 2, PL-61614 Poznan, Poland

[7] Polish Acad Sci, Inst Mol Phys, Ul Mariana Smoluchowskiego 17, PL-60179 Poznan, Poland

来源：

PHYSICAL REVIEW B | 2019年 / 100卷 / 23期

关键词：

COULOMB;

D O I：

10.1103/PhysRevB.100.235419

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of electron-electron interactions on the energy spectrum of surface electrons in a three-dimensional topological insulator is studied theoretically. The interaction includes both charge- and spin-dependent correlations. Using the Green's function method, we calculate the electron self-energy and determine the renormalized spin-orbit coupling strength. We find that the energy spectrum renormalized by spin-dependent electronic correlation turns nonlinear with respect to the wave vector k measured from the perfect Dirac cone (in the absence of electron-electron interactions). We also discuss charge screening contributions from surface and bulk electrons.

引用

页数：9

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