对具有高度发展键取向有序性的液晶进行空间分辨X射线研究。
Spatially resolved x-ray studies of liquid crystals with strongly developed bond-orientational order.
作者信息
Zaluzhnyy I A, Kurta R P, Sulyanova E A, Gorobtsov O Y, Shabalin A G, Zozulya A V, Menushenkov A P, Sprung M, Ostrovskii B I, Vartanyants I A
机构信息
Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany.
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoe shosse 31, 115409 Moscow, Russia.
出版信息
Phys Rev E Stat Nonlin Soft Matter Phys. 2015 Apr;91(4):042506. doi: 10.1103/PhysRevE.91.042506. Epub 2015 Apr 17.
We present an x-ray study of freely suspended hexatic films of the liquid crystal 3(10)OBC. Our results reveal spatial inhomogeneities of the bond-orientational (BO) order in the vicinity of the hexatic-smectic phase transition and the formation of large-scale hexatic domains at lower temperatures. Deep in the hexatic phase up to 25 successive sixfold BO order parameters have been directly determined by means of angular x-ray cross-correlation analysis (XCCA). Such strongly developed hexatic order allowed us to determine higher order correction terms in the scaling relation predicted by the multicritical scaling theory over a full temperature range of the hexatic phase existence.
我们展示了对液晶3(10)OBC自由悬浮六方相薄膜的X射线研究。我们的结果揭示了在六方相-近晶相转变附近键取向（BO）序的空间不均匀性，以及在较低温度下大规模六方畴的形成。在六方相深处，通过角X射线互相关分析（XCCA）直接确定了多达25个连续的六重BO序参量。这种高度发展的六方序使我们能够在六方相存在的整个温度范围内确定多临界标度理论预测的标度关系中的高阶修正项。
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