Lateral interfaces of transition metal dichalcogenides: A stable tunable one-dimensional physics platform

被引：29

作者：

Avalos-Ovando, Oscar ^{[1
,2
]}

Mastrogiuseppe, Diego ^{[3
]}

Ulloa, Sergio E. ^{[1
,2
]}

机构：

[1] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA

[2] Ohio Univ, Nanoscale & Quantum Phenomena Inst, Athens, OH 45701 USA

[3] Consejo Nacl Invest Cient & Tecn, Inst Fis Rosario, RA-2000 Rosario, Santa Fe, Argentina

来源：

PHYSICAL REVIEW B | 2019年 / 99卷 / 03期

关键词：

INPLANE HETEROSTRUCTURES; ELECTRONIC-STRUCTURES; MOSE2; NANORIBBONS; EPITAXIAL-GROWTH; SPIN;

D O I：

10.1103/PhysRevB.99.035107

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study in-plane lateral heterostructures of commensurate transition-metal dichalcogenides, such as MoS2-WS2 and MoSe2-WSe2, and find interfacial and edge states that are highly localized to these regions of the heterostructure. These are one-dimensional (1D) in nature, lying within the band gap of the bulk structure and exhibiting complex orbital and spin structure. We describe such heteroribbons with a three-orbital tight-binding model that uses first principles and experimental parameters as input, allowing us to model realistic systems. Analytical modeling for the 1D interfacial bands results in long-range hoppings due to the hybridization along the interface, with strong spin-orbit couplings. We further explore the Ruderman-Kittel-Kasuya-Yosida indirect interaction between magnetic impurities located at the interface. The unusual features of the interface states result in effective long-range exchange noncollinear interactions between impurities. These results suggest that transition-metal dichalcogenide interfaces could serve as stable, tunable 1D platform with unique properties for possible use in exploring Majorana fermions, plasma excitations, and spintronics applications.

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