Phys. Rev. Lett. 99, 227801 (2007) [4 pages]Polarization Studies of Resonant Forbidden Reflections in Liquid CrystalsReceived 28 May 2007; published 26 November 2007 We report the results of resonant x-ray diffraction experiments performed on thick films of a biaxial liquid crystal made of achiral bent-core molecules. Polarization properties of forbidden reflections are observed as a function of the sample rotation angle φ about the scattering vector Q for the first time on a fluid material. The experimental data are successfully analyzed within a tensor structure factor model by taking the nonperfect alignment of the liquid crystal into account. The local structure of the B2 mesophase is hence determined to be SmCSPA. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.227801
DOI:
10.1103/PhysRevLett.99.227801
PACS:
61.30.Eb, 61.10.Nz
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