Ferroelectric Instability and Dimensionality in Bi-Layered Perovskites and Thin Films

<table>The plot of the ferroelectric phase transition temperature <svg height="15.8375" id="M86" style="vertical-align:-3.3907pt" version="1.1" viewbox="0 0 16.9 15.8375" width="16.9" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,11.55)"><path d="M649 676l-22 -187l-33 -2q3 56 -12 94q-8 20 -31.5 26.5t-86.5 6.5h-74l-90 -491q-4 -23 -6 -36.5t1 -25t7 -16.5t18 -9t27 -5t41 -3l-6 -28h-286l4 28q68 5 84 18.5t28 76.5l94 491h-55q-74 0 -100.5 -6t-41.5 -23q-24 -29 -54 -98l-32 1q32 98 53 188h22q7 -18 15 -22
t37 -4h417q23 0 33.5 5t25.5 21h23z" id="x1D447"></path></g>
<g transform="matrix(.012,-0,0,-.012,11.388,15.637)"><path d="M383 397q0 -32 -35 -49q-12 -6 -23 8q-37 45 -84 45t-90 -71q-40 -65 -40 -167q0 -57 22 -86t59 -29q38 0 81.5 24.5t69.5 51.5l16 -21q-44 -53 -104 -84t-109 -31q-56 0 -89.5 41t-33.5 117q0 61 30 124t79 105q33 28 81 50.5t86 22.5q34 0 59 -15.5t25 -35.5z" id="x1D450"></path></g>
</svg><i> versus</i> film thickness of BaTiO<sub>3</sub> films grown on SrTiO<sub>3</sub> substrates, observed by Raman scattering [<a href="/journals/acmp/2012/714625/#B34">30</a>].</table>

Advances in Condensed Matter Physics

fig11

Figure 11

Figure 11: Ferroelectric Instability and Dimensionality in Bi-Layered Perovskites and Thin Films 