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- W3100101444 abstract "Monolayer transition metal dichalcogenides (TMDs) bare large Berry curvature hotspots readily exploitable for geometric band effects. Tailoring and enhancement of these features via strain is an active research direction. Here, we consider spinless two- and three-band and spinful four-band models capable to quantify the Berry curvature and the orbital magnetic moment of strained TMDs. First, we provide a k⋅p parameter set for MoS2, MoSe2, WS2, and WSe2 in the light of the recently released ab initio and experimental band properties. Its validity range extends from the K valley edge to about one hundred millielectron volts into valence and conduction bands for these TMDs. To expand this over a larger part of the Brillouin zone, we incorporate strain to an available three-band tight-binding Hamiltonian. With these techniques, we demonstrate that both the Berry curvature and the orbital magnetic moment can be doubled compared to their intrinsic values by applying typically a 2.5% biaxial tensile strain. These simple band structure tools can find application in the quantitative device modeling of the geometric band effects in strained monolayer TMDs." @default.
- W3100101444 created "2020-11-23" @default.
- W3100101444 creator A5041209480 @default.
- W3100101444 creator A5073425555 @default.
- W3100101444 date "2019-09-17" @default.
- W3100101444 modified "2023-10-18" @default.
- W3100101444 title "Geometric band properties in strained monolayer transition metal dichalcogenides using simple band structures" @default.
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- W3100101444 doi "https://doi.org/10.1063/1.5115093" @default.
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