Bulk band structure of Bi2Te3

被引：61

作者：

Michiardi, Matteo ^{[1
]}

Aguilera, Irene ^{[2
,3
,4
]}

Bianchi, Marco ^{[1
]}

de Carvalho, Vagner Eustaquio ^{[5
]}

Ladeira, Luiz Orlando ^{[5
]}

Teixeira, Nayara Gomes ^{[5
]}

Soares, Edmar Avellar ^{[5
]}

Friedrich, Christoph ^{[2
,3
,4
]}

Bluegel, Stefan ^{[2
,3
,4
]}

Hofmann, Philip ^{[1
]}

机构：

[1] Aarhus Univ, Dept Phys & Astron, Interdisciplinary Nanosci Ctr, DK-8000 Aarhus C, Denmark

[2] Forschungszentrum Julich, Peter Grunberg Inst, D-52425 Julich, Germany

[3] Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany

[4] JARA, D-52425 Julich, Germany

[5] Univ Fed Minas Gerais, ICEx, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil

来源：

PHYSICAL REVIEW B | 2014年 / 90卷 / 07期

关键词：

SINGLE DIRAC CONE; TOPOLOGICAL-INSULATOR; OPTICAL PROPERTIES; BISMUTH TELLURIDE; SURFACE; BI2SE3; GAP;

D O I：

10.1103/PhysRevB.90.075105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The bulk band structure of Bi2Te3 has been determined by angle-resolved photoemission spectroscopy and compared to first-principles calculations. We have performed calculations using the local density approximation (LDA) of density functional theory and the one-shot GW approximation within the all-electron full-potential linearized augmented-plane-wave (FLAPW) formalism, fully taking into account spin-orbit coupling. Quasiparticle effects produce significant changes in the band structure of Bi2Te3 when compared to LDA. Experimental and calculated results are compared in the spectral regions where distinct differences between the LDA and GW results are present. Overall a superior agreement with GW is found, highlighting the importance of many-body effects in the band structure of this family of topological insulators.

引用

页数：8

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