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Disorder-induced coupling of Weyl nodes in WTe2статья
- Авторы: Sykora Steffen, Schoop Johannes, Graf Lukas, Shipunov Grigory, Morozov Igor V., Aswartham Saicharan, Büchner Bernd, Hess Christian, Giraud Romain, Dufouleur Joseph
- Журнал: Physical Review Research
- Том: 2
- Номер: 3
- Год издания: 2020
- DOI: 10.1103/physrevresearch.2.033041
- Аннотация: The finite coupling between Weyl nodes due to residual disorder is investigated by magnetotransport studies in WTe2. The anisotropic scattering of quasiparticles is evidenced from classical and quantum transport measurements. A theoretical approach using the real band structure is developed in order to calculate the dependence of the scattering anisotropy with the correlation length of the disorder. A comparison between theory and experiments reveals a short correlation length inWTe2 (ξ ∼ 5 nm). This result implies a significant coupling betweenWeyl nodes and other bands. Our study thus shows that a finite intercone scattering rate always exists in weakly disordered type-II Weyl semimetals, such as WTe2, which strongly suppresses topologically nontrivial properties.
- Добавил в систему: Морозов Игорь Викторович