How can Green's function be used to calculate charge density of states?

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Discussion Overview

The discussion centers on the application of Green's functions in calculating the charge density of states, exploring theoretical underpinnings and specific examples from literature. The scope includes theoretical and applied physics concepts.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • Tanja inquires about the method of using Green's function to calculate charge density of states.
  • Another participant requests clarification and an example to better understand the application.
  • A participant references specific publications by Nieminen that suggest formulas for relating Green's functions to charge density, indicating a potential derivation method.
  • One participant notes that this topic is an application of Green's functions to physics and suggests moving the discussion to a more appropriate area.

Areas of Agreement / Disagreement

No consensus has been reached; participants are exploring the topic with varying levels of specificity and reference to literature.

Contextual Notes

The discussion lacks detailed derivations or explicit examples, and there are unresolved questions about the application of the referenced formulas.

Who May Find This Useful

Researchers and students interested in theoretical physics, particularly in the application of Green's functions and charge density calculations.

Tanja
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Does anybody know how Green's function can be used to calculate the charge density of state?
Thanks
Tanja
 
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Could you be more specific and post an example?
 
In Phys. Rev. B, 66, 165421 (2002) by Nieminen
they state that rho = - 1/pi Im(G°), without explanation and in
Phys. Rev. B 60, Number 4 (1999) also by Nieminen:
delta rho = -2/pi I am (int (delta G dE))
There must be a way to derive the density of state by Green's functions.
 
This is really an application of Green' functions to physics. I'm going to move it to a physics area.
 

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