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Diffstat (limited to 'main.tex')
| -rw-r--r-- | main.tex | 3 |
1 files changed, 2 insertions, 1 deletions
@@ -155,6 +155,7 @@ action of the point group, or \epsilon_\Btg^{(1)}=2\epsilon_{12} \\ \epsilon_\Eg^{(1)}=2\{\epsilon_{11},\epsilon_{22}\}. \end{aligned} + \label{eq:strain-components} \end{equation} Next, all quadratic combinations of these irreducible strains that transform like $\Aog$ are included in the free energy as @@ -183,7 +184,7 @@ If $\X$ is a representation not present in the strain there can be no linear coupling, and the effect of $\eta$ going through a continuous phase transition is to produce a jump in the $\Aog$ strain stiffness. We will therefore focus our attention on order parameter symmetries that produce linear couplings to -strain. +strain. Looking at the components present in \eqref{eq:strain-components}, this rules out all of the u-reps (odd under inversion) and the $\Atg$ irrep as having any anticipatory response in the strain stiffness. If the order parameter transforms like $\Aog$, odd terms are allowed in its free energy and any transition will be abrupt and not continuous without |