Year: 2025
Type: article
Abstract: Theories have revealed the universality of the band tilting effect in topological Weyl semimetals (WSMs) and its implications for the material physical properties. However, the experimental identification of tilted Weyl bands remains less explored. Here, we report the magneto-optical evidence of the tilting effect in WSM niobium phosphide. Specifically, we observe Landau level transitions with rich features that are well reproduced within a model of coupled tilted Weyl points. Our analysis indicates that the tilting effect relaxes the selection rules and leads to transitions that would otherwise be forbidden in the non-tilt case. Additionally, we observe unconventional interband transitions with flat and negative magnetic field dispersions, highlighting the importance of coupling between Weyl points. Our results not only emphasize the significance of the tilting effect in the optical responses of WSMs but also demonstrate magneto-optics as an effective tool for probing the tilting effect in electronic band structures.
Source: Nano Letters
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Funders: National Science Foundation, U.S. Department of Energy, National High Magnetic Field Laboratory, National Natural Science Foundation of China, Anhui Provincial Department of Education, Natural Science Foundation of Anhui Province, Division of Materials Research, High Magnetic Field Laboratory, Chinese Academy of Sciences, State of Florida
Awards: G1019936685, G12603893, G222768804, INCORPORATION OF THE HYBRID COORDINATE OCEAN MODEL (HYCOM) INTO THE COMMUNITY CLIMATE SYSTEM MODEL (CCSM): EVALUATION AND CLIMATE APPLICATIONS, Chalcogenides Superconductors: Nonconventional Superconductivity in New Phases, G4628046570, G5449040465, G7014230701, National High Magnetic Field Laboratory Renewal 2023-2027, G742574937, G7541729576, G8152425740, G8618556185, INFRARED OPTICAL STUDY OF GRAPHENE IN HIGH MAGNETIC FIELDS
OpenAlex ID: W4407241902