Explain why it is usually the magnitude, rather than the sign, of the order parameter that is important in defining the
Posted: Mon May 23, 2022 10:50 am
Explain why it is usually the magnitude, rather than the sign, of the order parameter that is important in defining the Free Energy of a state. Hence, comment on the fact that basic Landau Free Energy expressions usually only consider order parameter terms with even exponents. [6]