jarvis.analysis.darkmatter.metrics
==================================

.. py:module:: jarvis.analysis.darkmatter.metrics

.. autoapi-nested-parse::

   Module to calculate the dark-matter screening.



Functions
---------

.. autoapisummary::

   jarvis.analysis.darkmatter.metrics.peskin_schroeder_constant


Module Contents
---------------

.. py:function:: peskin_schroeder_constant(bandgap=None, fermi_velocities=[], epsilon=[])

   Provide Peskin Scroeder constant for a material.

   Just proportionality constant. Doesn't take into account
   g and Lambda.

   Args:
      bandgap: benadgap in eV.

      fermi_velocities: vx, vy, vz

      epslion:  eigenvalues of epsilon tensor


   Return:
      1/(epsion*vF)