Joseph, NB and Roy, S and Narayan, A (2021) Tunable topology and berry curvature dipole in transition metal dichalcogenide Janus monolayers. In: Materials Research Express, 8 (12).
Full text not available from this repository.Abstract
Janus transition metal dichalcogenides, with intrinsic mirror asymmetry, exhibit a wide array of interesting properties. In this work, we study Janus monolayers derived from WTe2 using first-principles and tight-binding calculations. We discover that WSeTe and WSTe are topologically trivial, in contrast to the parent quantum spin Hall insulator WTe2. Motivated by the growing interest in non-linear Hall effect, which also requires asymmetric structures, we investigate the Berry curvature and its dipole in these Janus systems and find that they exhibit strikingly large values of Berry curvature dipole, despite being in the topologically trivial phase. We track down the origin of this behaviour and put forth a low-energy massive Dirac model to understand the central features of our ab inito computations. Our predictions introduce Janus monolayers as promising new platforms for exploring as well as engineering non-linear Hall effect. © 2021 The Author(s). Published by IOP Publishing Ltd.
| Item Type: | Journal Article |
|---|---|
| Publication: | Materials Research Express |
| Publisher: | IOP Publishing Ltd |
| Additional Information: | The copyright for this article belongs to IOP Publishing Ltd |
| Keywords: | Calculations; Fruits; Monolayers; Quantum Hall effect; Selenium compounds; Spin Hall effect; Tellurium compounds; Topology; Tungsten compounds, Berry curvature; Berry curvature dipole; Dichalcogenides; Janus structure; Non linear; Non-linear hall effect; Topological materials; Transition metal dichalcogenides; Tunables; Two-dimensional materials, Transition metals |
| Department/Centre: | Division of Chemical Sciences > Solid State & Structural Chemistry Unit UG Programme |
| Date Deposited: | 01 Feb 2022 12:33 |
| Last Modified: | 01 Feb 2022 12:33 |
| URI: | http://eprints.iisc.ac.in/id/eprint/71189 |
Actions (login required)
 |
View Item |
