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How to insert strain on graphene using tight binding methods?
How strain can be applied in one of the x or y axis?
How strain can be applied in one of the x or y axis?
Graphene is a single layer of carbon atoms arranged in a honeycomb lattice structure. It is considered to be the thinnest, strongest, and most flexible material known to man. It has a high electrical conductivity, thermal conductivity, and mechanical strength, making it a promising material for various applications in electronics, energy storage, and biomedicine.
Tight binding method is a quantum mechanical approach used to study the electronic structure of materials. It involves constructing a Hamiltonian matrix that describes the interactions between electrons in the material. This method is used to study the effect of strain on graphene by incorporating the strain-induced changes in the lattice parameters into the Hamiltonian matrix and calculating the corresponding changes in the electronic band structure.
Strain on graphene can significantly alter its electronic properties. It can induce changes in the lattice parameters, bond lengths, and angles, which can affect the electronic band structure and alter the electronic properties such as the bandgap, carrier mobility, and conductivity. Understanding these changes is crucial for tailoring the electronic properties of graphene for specific applications.
Tight binding method is a powerful tool for studying the electronic properties of graphene under strain. However, it is an approximation and may not capture all the subtle changes in the electronic band structure. Therefore, it is important to validate the results with experimental data and other computational methods to ensure accuracy.
The ability to control and tailor the electronic properties of graphene through strain opens up a wide range of potential applications. Strained graphene can be used in electronic devices such as transistors, sensors, and solar cells. It can also be used in energy storage devices, medical implants, and water purification membranes. Additionally, strain engineering can enhance the performance of graphene-based composites in various fields.