Analysis of Electron Orbits in Magnetic Fields: Bravais Lattice

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SUMMARY

The discussion focuses on analyzing electron orbits in a crystal lattice subjected to a magnetic field, specifically using the semiclassical equations of motion and band structure for Bravais lattices. It emphasizes the behavior of electrons near the Fermi energy, which can exhibit open or closed orbits depending on the lattice structure. The participants suggest starting with a cubic Bravais lattice or a simpler 2D square lattice with the magnetic field oriented perpendicular to the plane. Key equations discussed include the semiclassical equation of motion, represented as hbar * dk/dt = -q(1/c * v x B).

PREREQUISITES
  • Understanding of Bravais lattices and their properties
  • Familiarity with semiclassical equations of motion
  • Knowledge of band structure theory
  • Basic concepts of electromagnetism, particularly Lorentz force
NEXT STEPS
  • Explore the properties of cubic Bravais lattices in detail
  • Study the behavior of electrons in 2D square lattices under magnetic fields
  • Learn about the implications of magnetic fields on electron dynamics
  • Investigate conserved quantities in semiclassical motion of charged particles
USEFUL FOR

Physicists, materials scientists, and students studying solid-state physics, particularly those interested in electron dynamics in crystalline structures under magnetic influences.

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Homework Statement



IF we consider electrons in a crystal subject to a magnetic field. The electrons near the fermi energy wil obey open or closed orbits.
Using semiclassical eqn of motion and band structure for a bravais lattice, discuss the behavour and derive all conserved quantities.

Homework Equations


hbar * dk/dt = -q(1/c * v x B )



The Attempt at a Solution


I have no idea which bravais lattice would be ideal for this problem.
 
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Try the simplest possible: a cubic one. Actually, you might like to try a 2D problem first, with a square lattice, and the magnetic field perpendicular to the plane. Further hint: magnetic fields do no work.
 

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