Harrison's Tight-Binding Theory

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In summary, if you are studying Solid State Physics or Condensed Matter, the Harrison's theory of tight-binding model may be of interest to you. This theory explains why atoms in solids cannot be thought of as having the same properties as atoms in isolation, due to significant overlapping with neighboring atoms. While solid state physics texts like Kittel's and Ashcroft/Mermin's provide an introduction to this topic, the two books published by Dover by Harrison are also recommended. Recently, a paper was published in Phys. Rev. B that proposes modifications and extensions to the tight-binding theory, claiming to improve its accuracy in predicting the ground state band structure for transition metals. This could be a valuable read for those in the field and could potentially serve as
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If you are studying Solid State Physics, or in Condensed Matter, this may be of interest to you if you haven't found it already.

Practically everyone in this field would have had to deal with the Harrison's theory of tight-binding model in calculating the "simple" band structure of solids. This is also the clearest indication why atoms in solids cannot be thought of as having the same properties as atoms in isolation - the valence shell can be severely changed due to significant overlapping with neighboring atoms. Solid State physics texts such as Kittel's and Ashcroft/Mermin's have ample introduction to this topic, but I also recommend the two Harrison's book now published by Dover (which incidentally, also contain a very good chapter on transport properties via the Boltzmann transport equation).

Anyway, this is all leading to a paper just published in Phys. Rev. B that produces a "modification and extension" to the tight-binding theory. As we all know, the standard tight-binding theory only works in a limited range, and could not accurately duplicate the band structure of transition metals, for example. These new modifications/extensions claim to improve at least the ground state band structure, while keeping the same "theme" of the original theory but with modified hopping parameters.

In any case, this I think would be a good read for people in this field, and may even be a good undergraduate senior project.

L. Shi and D.A. Papaconstantopoulos, Phys. Rev. B v.70, p.205101 (2004)

Zz.
 
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Thanks for the information! I'm definitely going to look into this paper as it seems like a great source of knowledge for solid state physics and condensed matter. I'm sure this would be a great read for people in this field and a great project for an undergraduate senior.
 

1. What is Harrison's Tight-Binding Theory?

Harrison's Tight-Binding Theory is a model used to describe the electronic structure of solid materials. It is based on the idea that the electrons in a solid can be approximated as being localized around individual atoms, and the interactions between these electrons can be described using a simple mathematical formula.

2. How does Harrison's Tight-Binding Theory differ from other models?

Harrison's Tight-Binding Theory differs from other models in that it takes into account the specific atomic environment of each individual atom in a solid, rather than treating all atoms as identical. This allows for a more accurate description of the electronic properties of a material.

3. What are the key assumptions of Harrison's Tight-Binding Theory?

The key assumptions of Harrison's Tight-Binding Theory are: (1) the electrons in a solid are localized around individual atoms, (2) the electron-electron interactions are described by a simple mathematical formula, and (3) the energy levels of the electrons are determined by the overlap of atomic orbitals.

4. What types of materials can Harrison's Tight-Binding Theory be applied to?

Harrison's Tight-Binding Theory can be applied to a wide range of materials, including metals, semiconductors, and insulators. It is particularly useful for describing the electronic properties of materials with a high degree of disorder, such as amorphous materials.

5. What are the limitations of Harrison's Tight-Binding Theory?

One limitation of Harrison's Tight-Binding Theory is that it does not take into account the effects of electron-electron correlations, which can be important in certain materials. It also does not account for the effects of lattice vibrations on the electronic structure. Additionally, it is a semi-empirical model and may not always accurately predict the electronic properties of a material without experimental input.

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