Strain effects in twisted spiral antimonene
arXiv:2310.17272 · doi:10.1002/advs.202301326
Abstract
van der Waals (vdW) layered materials exhibit fruitful novel physical properties. The energy band of such materials depends strongly on their structures and a tremendous variation in their physical properties can be deduced from a tiny change in inter-layer spacing, twist angle, or in-plane strain. In this work, a kind of vdW layered material of spiral antimonene is constructed, and the strain effects in the material are studied. The spiral antimonene is grown on a germanium (Ge) substrate and is induced by a helical dislocation penetrating through few-atomic-layers of antimonene (\b{eta}-phase). The as-grown spiral is intrinsically strained and the lattice distortion is found to be pinned around the dislocation. Both spontaneous inter-layer twist and in-plane anisotropic strain are observed in scanning tunneling microscope (STM) measurements. The strain in the spiral antimonene can be significantly modified by STM tip interaction, leading to a variation in the surface electronic density of states (DOS) and a large modification in the work function of up to a few hundreds of milli-electron-volts (meV). Those strain effects are expected to have potential applications in building up novel piezoelectric devices.
arXiv comment11 pages, 4 figures, Supporting Information
References in corpus (15)
- Magic-angle graphene superlattices: a new platform for unconventional superconductivity
- Tuning superconductivity in twisted bilayer graphene
- Intrinsic quantized anomalous Hall effect in a moiré heterostructure
- First direct observation of Spin-textures in Topological Insulators : Spin-resolved ARPES as a probe of topological quantum spin Hall effect and Berry's phase
- Layer-dependent Band Alignment and Work Function of Few-Layer Phosphorene
- Imaging Electronic Correlations in Twisted Bilayer Graphene near the Magic Angle
- Atomically thin group-V elemental films: theoretical investigations of antimonene allotropes
- Nematicity and Competing Orders in Superconducting Magic-Angle Graphene
- Transmission of topological surface states through surface barriers
- Pressure dependence of the magic twist angle in graphene superlattices
- Strain engineering Dirac surface states in heteroepitaxial topological crystalline insulator thin films
- Heterostrain rules the flat-bands in magic-angle twisted graphene layers
- Interplay of orbital effects and nanoscale strain in topological crystalline insulators
- Oscillations of van Hove singularities spacing induced by sub-Angstrom fluctuations of interlayer spacing in graphene superlattices
- Strain effects in twisted spiral antimonene