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Title: Optical investigations on the biaxial smectic-A phase of a bent-core compound
Authors: Wang, S.T.
Han, X.F.
Cady, A.
Liu, Z.Q.
Kamenev, A.
Glazman, L.
Sadashiva, B.K.
Reddy, Amaranatha R.
Huang, C.C.
Issue Date: 21-Dec-2004
Publisher: The American Physical Society
Citation: Physical Review E, 2004, Vol.70, 061705
Abstract: Several unique optical properties have been obtained from freestanding films of a bent-core compound. Our experimental results indicate the existence of the antiferroelectric biaxial smectic-A (Sm A) phase. The critical exponent associated with the biaxiality through the uniaxial–antiferroelectric biaxial Sm A transition has been measured to be 0.82±0.04, which is in good agreement with our theoretical calculation. Our theoretical advances further demonstrate that the critical behavior of the optical biaxiality with the order parameter being a vector is described by the secondary-order parameter of the three-dimensional XY model. We also observe a remarkable even–odd layering effect exhibited by the surface layers of freestanding films under an applied electric field (approximately 20 V/cm) in the film plane.
ISSN: ISSN 1550-2376 (online)
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Copyright: (2004) by the American Physical Society
Appears in Collections:Research Papers (SCM)

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