Termination-dependent surface properties in the giant-Rashba semiconductors BiTeX (X = Cl, Br, I)

被引：25

作者：

Fiedler, Sebastian ^{[1
,2
]}

Bathon, Thomas ^{[1
,2
]}

Eremeev, Sergey V. ^{[3
,4
,5
]}

Tereshchenko, Oleg E. ^{[5
,6
,7
]}

Kokh, Konstantin A. ^{[5
,7
,8
]}

Chulkov, Evgueni V. ^{[4
,5
,9
,10
,11
]}

Sessi, Paolo ^{[1
,2
]}

Bentmann, Hendrik ^{[1
,2
]}

Bode, Matthias ^{[1
,2
]}

Reinert, Friedrich ^{[1
,2
]}

机构：

[1] Univ Wurzburg, Expt Phys 7, D-97074 Wurzburg, Germany

[2] Univ Wurzburg, Rontgen Res Ctr Complex Mat RCCM, D-97074 Wurzburg, Germany

[3] Inst Strength Phys & Mat Sci, Tomsk 634055, Russia

[4] Tomsk State Univ, Tomsk 634050, Russia

[5] St Petersburg State Univ, St Petersburg 198504, Russia

[6] Inst Semicond Phys, Novosibirsk 636090, Russia

[7] Novosibirsk State Univ, Novosibirsk 636090, Russia

[8] SB RAS, Inst Geol & Mineral, Novosibirsk 630090, Russia

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

[10] Univ Pais Vasco Euskal Herriko Unibertsitatea, Fac Ciencias Quim, Dept Fis Mat, San Sebastian 20080, Basque Country, Spain

[11] Univ Pais Vasco Euskal Herriko Unibertsitatea, Fac Ciencias Quim, Ctr Mixto CSIC UPV EHU, San Sebastian 20080, Basque Country, Spain

来源：

PHYSICAL REVIEW B | 2015年 / 92卷 / 23期

基金：

俄罗斯基础研究基金会;

关键词：

PHASE;

D O I：

10.1103/PhysRevB.92.235430

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The noncentrosymmetric semiconductors BiTeX (X = Cl, Br, I) show large Rashba-type spin-orbit splittings in their electronic structure making them candidate materials for spin-based electronics. However, BiTeI(0001) single-crystal surfaces usually consist of stacking-fault-induced domains of Te and I terminations implying a spatially inhomogeneous electronic structure. Here we combine scanning tunneling microscopy, photoelectron spectroscopy (ARPES, XPS), and density functional theory calculations to systematically investigate the structural and electronic properties of BiTeX(0001) surfaces. For X = Cl, Br we observe macroscopic single-terminated surfaces. We discuss chemical characteristics among the three materials in terms of bonding character, surface electronic structure, and surface morphology.

引用

页数：10

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