ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Strain-induced topological charge control in multifold fermion systems

Bose, A and Narayan, A (2021) Strain-induced topological charge control in multifold fermion systems. In: Journal of Physics Condensed Matter, 33 (37).

jou_phy_con_mat_33-37_2021.pdf - Published Version

Download (2MB) | Preview
Official URL: https://doi.org/10.1088/1361-648X/ac0fa0


Multifold fermion systems feature free fermionic excitations, which have no counterparts in high-energy physics, and exhibit several unconventional properties. Using first-principles calculations, we predict that strain engineering can be used to control the distribution of topological charges in transition metal silicide candidate CoSi, hosting multifold fermions. We demonstrate that breaking the rotational symmetry of the system, by choosing a suitable strain, destroys the multifold fermions, and at the same time results in the creation of Weyl points. We introduce a low energy effective model to complement the results obtained from density functional calculations. Our findings suggest that strain-engineering is a useful approach to tune topological properties of multifold fermions. © 2021 IOP Publishing Ltd.

Item Type: Journal Article
Publication: Journal of Physics Condensed Matter
Publisher: IOP Publishing Ltd
Additional Information: The copyright for this article belongs to Authors
Keywords: Calculations; High energy physics; Silicides; Transition metals, Fermion systems; Fermionic excitations; First-principles calculation; Rotational symmetries; Strain engineering; Topological charges; Topological properties; Transition metal silicides, Topology
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 21 Sep 2021 09:33
Last Modified: 21 Sep 2021 09:33
URI: http://eprints.iisc.ac.in/id/eprint/69784

Actions (login required)

View Item View Item