Mechanism of field-induced unwinding of SmC* helix and biasfield dependencies of dielectric permittivity and effective polarization
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2008Citation:
Song, J.-K., Manna, U., Vij, J.K. , Mechanism of field-induced unwinding of SmC* helix and biasfield dependencies of dielectric permittivity and effective polarization, Europhysics Letters, 82, 2, 2008Download Item:
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Abstract:
We propose an unwinding model based on helical fractures confirmed by spectroscopic
and microscopic observations. This model combined with the fixed helical pitch can explain the
various physical phenomena observed in SmC? phase of ferroelectric liquid crystals. These are
the dc field dependencies of i) dielectric strength, ii) relaxation frequency of the Goldstone mode,
and iii) the effective polarization. The conventional diverging pitch model where the helical pitch
increases with an increase in the field is shown not to satisfactorily explain these observations.
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Science Foundation Ireland (SFI)
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http://people.tcd.ie/jvijDescription:
PUBLISHEDArticle number 26003 5pgs
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Europhysics Letters82
2
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http://dx.doi.org/10.1209/0295-5075/82/26003Licences: