Obtaining the Drude Equation for Electrons in Metals Using a Fractional Variational Principle

Luis Fernando Mora Mora

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arXiv · 2001.08531

Obtaining the Drude Equation for Electrons in Metals Using a Fractional Variational Principle

Luis Fernando Mora Mora

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Abstract

A fractional variational principle was derived in order to be used with lagrangians containing fractional derivatives of order 1/2. By forcing the action associated to this type of lagrangian to be stationary, a modified fractional Euler-Lagrange equation was obtained. This was shown to reproduce the equations of motion of two basic 1-dimensional energy-dissipative systems: a spring-mass system damped by friction, and a RLC circuit connected in series. Finally, by using the fractional Euler-Lagrange equation, the Drude relationship for electrons in metals was recovered when a fractional kinetic energy was taken into consideration in the electron's associated energies.

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Luis Fernando Mora Mora. 2020-01-13. Obtaining the Drude Equation for Electrons in Metals Using a Fractional Variational Principle. https://arxiv.org/abs/2001.08531

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