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Evidence for an extended critical fluctuation region above the polar ordering transition in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>Li</mml:mi><mml:mi>Os</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>
This paper uses optical second harmonic generation rotational anisotropy, in combination with a model of hyper-polarizable bonds, to show that screening of long-range Coulomb interactions in a polar metal can lead to an extended critical fluctuation region above the polar transition temperature