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Title
Japanese: 
English:Electronic conduction in nematic phase of small molecules 
Author
Japanese: 徳永圭治, 高屋敷由紀子, 飯野裕明, 半那純一.  
English: Keiji Tokunaga, Yukiko Takayashiki, Hiroaki Iino, Jun-ichi Hanna.  
Language English 
Journal/Book name
Japanese: 
English:PHYSICAL REVIEW B 
Volume, Number, Page Vol. 79    No. 3    pp. 033201
Published date Jan. 2009 
Publisher
Japanese: 
English:The American Physical Society 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL http://link.aps.org/doi/10.1103/PhysRevB.79.033201
 
DOI https://doi.org/10.1103/PhysRevB.79.033201
Abstract We investigated charge-carrier transport in the nematic phase of small molecules such as 2-phenylbenzothiazoles by time-of-flight experiments, in which the conduction mechanism has been considered to be ionic. As a result, we established the hole and electron transports in the nematic phase of highly purified samples: we found that there were two transits, namely, fast and slow transits, in less pure samples; the slow transit was attributed to ionic conduction originating from trace amounts of impurities and the fast transit was attributed to electronic conduction whose attribution was elucidated by mobility changes in the diluted samples with a hydrocarbon of n-tetradecane (n-C14H30). From these results, we conclude that the intrinsic conduction mechanism in the nematic phase of small molecules is ambipolar and electronic, irrespective of the size of the pi-conjugate system of the core moiety. Thus, they provide a new insight into the conduction mechanism in fluidic materials.

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