title: Link of microscopic and macroscopic fields in nematodynamics.
abstract: We have found an unusual and unexpected link between micro- (nematic director) and macro- (velocity) fields in nematodynamics, which exhibits itself in extended defects of a new type. In particular, we have shown that black lines (BLs) observed in electroconvection of a homeotropically aligned nematic layer are simultaneously Bloch's domain walls for the director field and lines of zero velocity intersecting a roll pattern for the convection. A detailed experimental study revealing the fine structure of BLs and their point defects is presented.
authors.affiliation: Department of Applied Quantum Physics and Nuclear Engineering, Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan. rinto@athena.ap.kyushu-u.ac.jp
authors.forename: Rinto
authors.initials: R
authors.lastname: Anugraha
authors.forename: Fahrudin
authors.initials: F
authors.lastname: Nugroho
authors.forename: Tatsuhiro
authors.initials: T
authors.lastname: Ueki
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Hidaka
authors.forename: Shoichi
authors.initials: S
authors.lastname: Kai
authors.forename: Michael I
authors.initials: MI
authors.lastname: Tribelsky