Regensburg 2022 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 8: Crystallography in Materials Science, Microstructure and Dielectric Properties

KFM 8.5: Vortrag

Montag, 5. September 2022, 16:35–16:55, H7

Strain-Induced Collapse of Landau Levels in TaAs — •Yang-Jun Lee^1,2,3, Cheol-Hwan Park^1,2,3, and Maria A.H Vozmediano⁴ — ¹Center for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, Korea — ²Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea — ³Center for Theoretical Physics, Seoul National University, Seoul 08826, Korea — ⁴Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, Madrid 28049, Spain

A Weyl semimetal, which has a topologically protected conic electronic structure, hosts interesting phenomena such as Fermi arc surface states and chiral anomaly. Recently, the deformation-driven pseudo gauge fields in strained Weyl semimetals have received attention. Among such examples is the collapse of strain-induced Landau levels in Weyl semimetal. In this study, we establish the theory for the effect of strain-induced gauge fields on realistic Weyl semimetals, and based on first-principles calculations, we investigate the conditions on the external strain for the collapse of Landau levels in TaAs.