Diffusion inter-cônes des fermions de Weyl induite par le désordre dans WTe$_2$
| Autor: | Joseph Dufouleur, Steffen Sykora, Igor Morozov, Saicharan Aswartham, G. Shipunov, Bernd Büchner, Romain Giraud, Johannes Schoop, Lukas Graf, Christian Hess |
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| Přispěvatelé: | Leibniz Institute for Solid State and Materials Research (IFW Dresden), Leibniz Association, SPINtronique et TEchnologie des Composants (SPINTEC), Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA) |
| Rok vydání: | 2020 |
| Předmět: |
Symmetry protected topological states
FOS: Physical sciences 02 engineering and technology 01 natural sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Topological phases of matter Order (group theory) 010306 general physics Electronic band structure Anisotropy [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall] Physics Coupling Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Scattering Topological materials 021001 nanoscience & nanotechnology Semimetal Quantum transport Scattering rate [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Quasiparticle 0210 nano-technology |
| Zdroj: | Physical Review Research Physical Review Research, American Physical Society, 2020, ⟨10.1103/PhysRevResearch.2.033041⟩ Physical Review Research, 2020, ⟨10.1103/PhysRevResearch.2.033041⟩ |
| ISSN: | 2643-1564 |
| Popis: | The finite coupling between Weyl nodes due to residual disorder is investigated by magnetotransport studies in WTe$_2$. The anisotropic scattering of quasiparticles is evidenced from classical and quantum transport measurements. A new theoretical approach using a real band structure is developed to calculate the dependence of the scattering anisotropy with the correlation length of the disorder. A comparison between theory and experiments reveals for the first time a short correlation length in WTe$_2$ ($\xi$~nm). This result implies a significant coupling between Weyl nodes and other bands, so that inter-node scattering strongly reduces topologically non-trivial properties, such as the chiral anomaly. Comment: Revisited version |
| Databáze: | OpenAIRE |
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