Multiple Coexisting Dirac Surface States in Three-Dimensional Topological Insulator PbBi6Te10

被引：40

作者：

Papagno, Marco ^{[1
]}

Eremeev, Sergey V. ^{[2
,3
,4
]}

Fujii, Jun ^{[5
]}

Aliev, Ziya S. ^{[6
,7
]}

Babanly, Mahammad B. ^{[6
]}

Mahatha, Sanjoy Kr ^{[8
]}

Vobornik, Ivana ^{[5
]}

Mamedov, Nazim T. ^{[7
]}

Pacile, Daniela ^{[1
]}

Chulkov, Evgueni V. ^{[3
,4
,9
,10
,11
]}

机构：

[1] Univ Calabria, Dipartimento Fis, I-87036 Calabria, Italy

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

[3] Tomsk State Univ, Tomsk 634050, Russia

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

[5] AREA Sci Pk Basovizza, CNR IOM, TASC Lab, I-34149 Trieste, Italy

[6] Azerbaijan Natl Acad Sci, Inst Catalysis & Inorgan Chem, AZ-1143 Baku, Azerbaijan

[7] Azerbaijan Natl Acad Sci, Inst Phys, AZ-1143 Baku, Azerbaijan

[8] CNR, Ist Struttura Mat, I-34149 Trieste, Italy

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

[10] Univ Basque Country, CSIC, Ctr Fis Mat CFM MPC, Dept Fis Mat, San Sebastian 20080, Basque Country, Spain

[11] Univ Basque Country, CSIC, Ctr Mixto, San Sebastian 20080, Basque Country, Spain

来源：

ACS NANO | 2016年 / 10卷 / 03期

关键词：

topological insulator; Dirac surface states; ARPES; STM; DFT; 2-DIMENSIONAL ELECTRON-GAS; QUANTUM-WELL STATES; TRANSITION; ORDER; BULK; CONE;

D O I：

10.1021/acsnano.5b07750

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

By means of angle-resolved photoemission spectroscopy (ARPES) measurements, we unveil the electronic band structure of three-dimensional PbBi6Te10 topological insulator. ARPES investigations evidence multiple coexisting Dirac surface states at the zone-center of the reciprocal space, displaying distinct electronic band dispersion, different constant energy contours, and Dirac point energies. We also provide evidence of Rashba-like split states close to the Fermi level, and deeper M- and Vshaped bands coexisting with the topological surface states. The experimental findings are in agreement with scanning tunneling microscopy measurements revealing different surface terminations according to the crystal structure of PbBi6Te10. Our experimental results are supported by density functional theory calculations predicting multiple topological surface states according to different surface cleavage planes.

引用

页码：3518 / 3524

页数：7

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