Transformation of the Topological Phase and the Edge Modes of Double-Bilayer Bismuthene with Inter-Bilayer Spacing

Hu, Huanzhi; Shi, Zhibin; Wang, Peng; Zhou, Weiping; Chiang, T.‐C.; Wang, Xiaoxiong

doi:10.3390/cryst9050266

Cited by 2 publications

(2 citation statements)

References 33 publications

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“…To harness the undefined properties of bismuthene more effectively, numerous approaches have been employed. For instance, the band structure of monolayer bismuthene has been modified by adjusting the in-plane strain, and the topological properties have been investigated by altering the interlayer spacing [21,22].…”

Section: Introductionmentioning

confidence: 99%

Modulating electronic structure by interlayer spacing and twist on bilayer bismuthene

Zhang,

Cheng,

Chen

et al. 2024

J. Phys.: Condens. Matter

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Modulation of the electronic structure has played a crucial role in advancing the field of two-dimensional materials, but there are still many unexplored directions, such as the twist angle for a novel degree of freedom, for modulating the properties of heterostructures. We observed a distinct pattern in the energy bands of bilayer bismuthene, demonstrating that modulating the twist angle and interlayer spacing significantly influences interlayer interactions. Our study of various interlayer spacings and twist angles revealed a close relationship between bandgap size and interlayer spacing, while the twist angle notably affects the shape of the energy bands. Furthermore, we observed a synergistic effect between these two factors. As the twist angle decreases, the energy bands become flat, and flat bands can be generated without requiring a specific angle on bilayer bismuthene. Our results suggest a promising way to tailor the energy band structure of bilayer 2D materials by varying the interlayer spacing and twist angle.

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Section: Introductionmentioning

confidence: 99%

Modulating electronic structure by interlayer spacing and twist on bilayer bismuthene

Zhang,

Cheng,

Chen

et al. 2024

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…To verify their topological features, the Zak phase of each band was calculated and reveals the condition of topological phase transition accordingly. Hu et al studied the transformations of the topological phase and the edge modes of double-bilayer bismuthine [6]. At a critical spacing of 2 Å, a topological phase transition from a topological insulator to a band insulator resulting from a band…”

mentioning

confidence: 99%