
 dynamics, but also increases the deviation of the system from the
 Born-Oppenheimer surface. The default is 1, which means that both
 timescales are the same. Note that a value different than 1
 implies that the electrons will not follow physical behaviour.
<br><br>
 According to our tests, values around 10 are reasonable, but it
 will depend on your system, mainly on the width of the gap.
<br><br>
 Important: The electronic time step will be the value of
 <tt>TDTimeStep</tt> divided by this variable, so 