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Do the short helices exist in the nematic TB phase?
Preprint
Ewa Gorecka ,
Miroslaw Salamonczyk ,
Anna Zep ,
Damian Pociecha ,
Chris Welch ,
Ziauddin Ahmed ,
Georg H. Mehl
23 October 2014
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Abstract
Dimeric compounds forming twist-bend nematic, Ntb, phase show unusual optical texture related to the formation of arrays of focal conic defects. Some of the focal conics show submicron internal structure with 8 nm periodicity, which is very close to that found in the crystalline phase of the material, suggesting surface freezing.