Electrical Analogue Simulating a crystal Lattice

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Discussion Overview

The discussion revolves around the concept of simulating a crystal lattice using an electrical analogue, specifically through the use of LC filters. Participants explore the relationship between wave propagation in crystal lattices and electrical waves in transmission lines, as well as the challenges of accessing relevant literature on the topic.

Discussion Character

  • Exploratory
  • Technical explanation
  • Homework-related

Main Points Raised

  • One participant seeks clarification on how LC filters can relate to the concept of a crystal lattice.
  • Another participant explains that the transmission of 1-dimensional waves through a crystal lattice can be modeled using a parallel wire transmission line with inductors and capacitors, highlighting characteristics such as dispersion and frequency cutoff.
  • The same participant notes that using different values of inductance or capacitance at alternating positions can model acoustic and optic branches and band gaps similar to those in diatomic solids.
  • A request for assistance in finding a specific book by Leon Brillouin is made, indicating difficulty in locating it at university libraries.
  • Another participant humorously questions how the requester knows which pages to ask for if they cannot find the book, while also providing links to purchase the book online.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the specifics of the electrical analogue or the accessibility of the literature, as the discussion includes both technical explanations and requests for resources without resolution.

Contextual Notes

There are limitations regarding the availability of the referenced book, and the discussion does not resolve the specifics of the electrical model or its application to crystal lattices.

willy4urdilly
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hey guys...im stuck with this experiment of an Electrical Analogue Simulating a crystal Lattice...could anyone explain me the whole concept of relating a set of LC filters to a crystal lattice?
 
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The transmission of waves (at least 1-dimensional waves) through a crystal lattice is analogous to electrical waves propagating down a transmission line. The lumped-element model of a parallel wire transmission line where the wires are each a long series string of inductors, and where capacitors bridge across the wires, displays dispersion, frequency cutoff, and other characteristics of waves in a solid. If two different values of inductance or capacitance are used at alternating positions in the electrical model, then it displays the acoustic and optic branches and band gap that you also see in a diatomic solid. Leon Brillouin has a detailed and beautiful description in his book "Wave Propagation in Periodic Structures," where he also gives mechanical analogs of same. I think it's out of print, but because it was reprinted by Dover there are a ton of copies floating around. You should find it at your university library.
 
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Kindly Help Me Find It!

thanks for the valuable suggestion!
but i hunted for the book in three related departments of my varsity but could not find a single copy. i even tried to find an e book.please suggest me some link where i can get the online version.the book is not available in the local market...i would request u to scan page numbers 45-68 of the 2nd edition by Dover and upload them to <abhishekminhas@gmail.com>
it would be a great help
 
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