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Electronic band evolution between Lieb and kagome nanoribbons
E S Uchôa1, W P Lima1, S H R Sena2
1Departamento de Física, Universidade Federal do Ceará, Campus do Pici, 60455-900 Fortaleza, Ceará, Brazil.
Nanotechnology
|January 3, 2025
Summary
This study explores electronic properties of Lieb and kagome nanoribbons, revealing a semiconductor-to-metallic transition controlled by a single parameter. Edge states and energy gaps are analyzed across various nanoribbon configurations.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanoscience
Background:
- Nanoribbons exhibit unique electronic properties influenced by their lattice structure and edge termination.
- Understanding the interconversion between different lattice types, such as Lieb and kagome, is crucial for designing novel electronic materials.
Purpose of the Study:
- To investigate the electronic properties of monolayer Lieb, transition, and kagome nanoribbons.
- To map the interconvertibility between Lieb and kagome nanoribbons using a single control parameter.
- To analyze the impact of edge types, nanoribbon width, and hopping terms on electronic behavior.
Main Methods:
- Utilized the tight-binding model with a generic Hamiltonian.
- Calculated energy spectra, density of states, and spatial probability density distributions.
- Examined nanoribbons with straight, bearded, and asymmetric edges.
Main Results:
- Demonstrated a semiconductor-to-metallic transition driven by Lieb-kagome lattice interconvertibility.
- Analyzed the influence of nanoribbon width and next-nearest-neighbor hopping on quasi-flat state degeneracy.
- Characterized the energy gap behavior, edge states, and nodal distributions of non-dispersive states.
Conclusions:
- The study provides a comprehensive understanding of electronic properties in Lieb and kagome nanoribbons.
- Identified key parameters controlling electronic transitions and state degeneracies.
- Offers insights into the design of nanoribbon-based electronic devices with tunable properties.
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