The displacement field around an isolated elementary dislocation in a medium with one-dimensional periodicity is established experimentally. The system studied is a cholesteric fingerprint texture with a macroscopic (∼10 μm) periodicity. The characteristic elastic length is smaller than the “interlayer” distance. As a result, the experimental dislocation profile deviates from the classic pattern predicted by the linear elastic theory but fits well with the recently suggested nonlinear theory of dislocation [Phys. Rev. E 59, R4752 (1999)].
Physical Review E
Copyright 1999 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevE.60.R5037.
Ishikawa, T.; Lavrentovich, Oleg (1999). Dislocation Profile in Cholesteric Finger Texture. Physical Review E 60(5) R5037-R5039. doi: 10.1103/PhysRevE.60.R5037. Retrieved from https://oaks.kent.edu/cpippubs/76