Topological edge states in correlated honeycomb materials with strong spin-orbit coupling

被引：12

作者：

Catuneanu, Andrei ^{[1
,2
]}

Kim, Heung-Sik ^{[1
,2
]}

Can, Oguzhan ^{[1
,2
]}

Kee, Hae-Young ^{[1
,2
,3
]}

机构：

[1] Univ Toronto, Dept Phys, 60 St George St, Toronto, ON M5S 1A7, Canada

[2] Univ Toronto, Ctr Quantum Mat, 60 St George St, Toronto, ON M5S 1A7, Canada

[3] Canadian Inst Adv Res, Quantum Mat Program, Toronto, ON M5G 1Z8, Canada

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 12期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

GRAPHENE; SYSTEMS; MODEL;

D O I：

10.1103/PhysRevB.94.121118

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the topological nature of single layers of correlated honeycomb materials alpha-RuCl3 and A(2)IrO(3) (A = Li, Na) with strong spin-orbit coupling. An effective tight-binding model based on first principles band structure calculations including Hubbard and spin-orbit coupling is derived. Two pairs of propagating edge modes centered at the zone center and zone boundary are found when their one-dimensional boundary forms a zigzag shape, while the bulk has a gap with trivial time-reversal Z(2) invariants. The effects of strong electronic interactions and doping on the edge modes in these Mott insulators are discussed. We further suggest a heterostructure of alpha-RuCl3/IrCl3 to search for the proposed topological Mott phase.

引用

页数：5

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