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Structural properties of Bi/Au(110).
Egzona Neziri1, Wei Zhang1, Alexander Smogunov2
1Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, F-91405 Orsay, France.
Nanotechnology
|February 27, 2023
Summary
Atomically thin bismuth films offer unique properties for spintronics and optoelectronics. This study reveals specific structural reconstructions of bismuth on gold surfaces at various coverages, proposing atomic models.
Area of Science:
- Surface science
- Materials science
- Condensed matter physics
Background:
- Atomically thin bismuth (2D Bi) films are gaining attention for their unique properties.
- These films have potential applications in spintronics, electronic, and optoelectronic devices.
Purpose of the Study:
- To investigate the structural properties of bismuth films on a gold (Au(110)) surface.
- To identify and characterize specific surface reconstructions at sub-monolayer bismuth coverages.
Main Methods:
- Low-energy electron diffraction (LEED) for structural analysis.
- Scanning tunneling microscopy (STM) for atomic-scale imaging.
- Density functional theory (DFT) calculations for theoretical validation.
Main Results:
- Observed various surface reconstructions at bismuth coverages below one monolayer (ML).
- Focused on Bi/Au(110)-c(2 × 2) reconstruction at 0.5 ML and Bi/Au(110)-(3 × 3) structure at 0.66 ML.
- Proposed structural models for these reconstructions supported by STM and DFT.
Conclusions:
- The study elucidates the atomic structures of specific bismuth reconstructions on Au(110).
- These findings contribute to understanding 2D bismuth growth and its surface properties.
- The proposed models provide a basis for further research into 2D Bi applications.
