The effect of van der Waal's gap expansions on the surface electronic structure of layered topological insulators

被引：66

作者：

Eremeev, S. V. ^{[2
,3
]}

Vergniory, M. G. ^{[1
,4
]}

Menshchikova, T. V. ^{[3
]}

Shaposhnikov, A. A. ^{[3
]}

Chulkov, E. V. ^{[1
,5
,6
]}

机构：

[1] DIPC, San Sebastian 20018, Basque Country, Spain

[2] Inst Strength Phys & Mat Sci, Tomsk 634021, Russia

[3] Tomsk State Univ, Tomsk 634021, Russia

[4] Max Planck Inst Mikrostrukturphys, D-52425 Julich, Germany

[5] UPV, CFM, Dept Fis Mat, EHU,MPC, San Sebastian 20080, Basque Country, Spain

[6] UPV, EHU, Ctr Mixto, CSIC, San Sebastian 20080, Basque Country, Spain

来源：

NEW JOURNAL OF PHYSICS | 2012年 / 14卷

关键词：

SINGLE DIRAC CONE; AB-INITIO; STATES; INTERCALATION; BI2TE3; SB2TE3; BI2SE3; METAL;

D O I：

10.1088/1367-2630/14/11/113030

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

On the basis of relativistic ab initio calculations, we show that an expansion of van der Waal's (vdW) spacings in layered topological insulators caused by intercalation of deposited atoms, leads to the simultaneous emergence of parabolic and M-shaped two-dimensional electron gas (2DEG) bands as well as Rashba-splitting of the former states. The expansion of vdW spacings and the emergence of the 2DEG states localized in the (sub) surface region are also accompanied by a relocation of the topological surface state to the lower quintuple layers, that can explain the absence of inter-band scattering found experimentally.

引用

页数：13

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