Spin texture on the warped Dirac-cone surface states in topological insulators

被引：65

作者：

Basak, Susmita ^{[1
]}

Lin, Hsin ^{[1
]}

Wray, L. A. ^{[2
,3
]}

Xu, S-Y. ^{[2
,3
]}

Fu, L. ^{[4
]}

Hasan, M. Z. ^{[2
,3
]}

Bansil, A. ^{[1
]}

机构：

[1] Northeastern Univ, Dept Phys, Boston, MA 02115 USA

[2] Princeton Univ, Joseph Henry Labs Phys, Princeton, NJ 08544 USA

[3] Princeton Univ, Princeton Ctr Complex Mat, Princeton, NJ 08544 USA

[4] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 12期

关键词：

FERMI-SURFACE; PHOTOEMISSION-SPECTROSCOPY; PHASE; BI2TE3;

D O I：

10.1103/PhysRevB.84.121401

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the nature of surface states in the Bi2Te3 family of three-dimensional topological insulators using first-principles calculations as well as a model Hamiltonian approach. When the surface Dirac cone is warped due to Dresselhaus spin-orbit coupling in rhombohedral structures, the spin acquires a finite out-of-the-plane component. We provide a simple, minimal model to describe the in-plane spin texture of the warped surface Dirac cone observed in experiments where spins are seen to be not aligned perpendicular to the electron momentum. Our k . p model calculation reveals that this in-plane spin texture requires fifth-order Dresselhaus spin-orbit coupling terms.

引用

页数：4

共 40 条

[1] Emergence of multiple Fermi surface maps in angle-resolved photoemission from Bi2Sr2CaCu2O8+δ -: art. no. 014519 [J].