Orbital Hall effect and topology on a two-dimensional triangular lattice
We investigate a generalized multiorbital tight-binding model on a triangular lattice, a system prevalent in a wide range of two-dimensional materials and particularly relevant for simulating transition metal dichalcogenide monolayers. We show that the interplay between spin-orbit coupling and diffe...
| Autores: | , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:308871 |
| Acceso en línea: | https://ddd.uab.cat/record/308871 https://dx.doi.org/urn:doi:10.1103/PhysRevB.110.085412 |
| Access Level: | acceso abierto |
| Palabra clave: | Edge state Orbitals Spin-orbit couplings Symmetry breakings Tight-binding modeling Topological phase Transition metal dichalcogenides (TMD) Triangular-lattice Two-dimensional Two-dimensional materials |
| Sumario: | We investigate a generalized multiorbital tight-binding model on a triangular lattice, a system prevalent in a wide range of two-dimensional materials and particularly relevant for simulating transition metal dichalcogenide monolayers. We show that the interplay between spin-orbit coupling and different symmetry-breaking mechanisms leads to the emergence of four distinct topological phases [Eck, Phys. Rev. B 107, 115130 (2023)2469-995010.1103/PhysRevB.107.115130]. Remarkably, this interplay also triggers the orbital Hall effect with distinguished characteristics. Furthermore, by employing the Landauer-Büttiker formula, we establish that in the orbital Hall insulating phase, the orbital angular momentum is carried by edge states present in nanoribbons with specific terminations. We also show that they do not have the same topological protection against the disorder of the edge states as a first-order topological insulator. |
|---|