Dielectric investigations of the dynamics of the hexatic-hexatic transition in a chiral liquid crystal

S. Krishna Prasad; Geetha G. Nair; Rajni kant

doi:10.1103/PhysRevE.57.1789

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Dielectric investigations of the dynamics of the hexatic-hexatic transition in a chiral liquid crystal

S. Krishna Prasad, Geetha G. Nair, and Rajni kant^*

Centre for Liquid Crystal Research, Jalahalli, Bangalore 560 013, India

^*Permanent address: Physics Department, Jammu University, Jammu 180 004, India.

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Phys. Rev. E 57, 1789 – Published 1 February, 1998

DOI: https://doi.org/10.1103/PhysRevE.57.1789

Abstract

We report a detailed investigation of the dynamics of the hexatic–smectic- $I^{*}$ to hexatic–smectic- $F^{*}$ phase transition in a chiral liquid-crystalline compound. The results show a dramatic softening of the relaxation frequency and an associated divergence of the susceptibility on approaching the transition. The temperature dependence of both these parameters can be described by a power law with an exponent equal to 1, in agreement with the theoretical predictions.

References (13)

See, e.g., P. S. Pershan, Structure of Liquid Crystal Phases (World Scientific, Singapore, 1988).
D. R. Nelson and B. I. Halperin, Phys. Rev. B 21, 5312 (1980).
S. Krishna Prasad, D. S. Shankar Rao, S. Chandrasekhar, M. E. Neubert, and J. W. Goodby, Phys. Rev. Lett. 74, 270 (1995).
H. Yao, T. Chan, and C. W. Garland, Phys. Rev. E 51, 4585 (1995).
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D. A. Dunmur, D. A. Hitchen, and M. R. Manterfield, J. Phys. E 20, 866 (1987).
See, e.g., N. E. Hill, W. E. Vaughan, A. H. Price, and M. Davies, Dielectric Properties and Molecular Behaviour (Van Nostrand, New York, 1969), p. 49ff.
P. E. Cladis, W. Van Saarloos, D. A. Huse, J. S. Patel, J. W. Goodby, and P. L. Finn, Phys. Rev. Lett. 62, 1764 (1989).
P. C. Hohenberg and B. I. Halperin, Rev. Mod. Phys. 49, 435 (1977).

[c1] See, e.g., P. S. Pershan, Structure of Liquid Crystal Phases (World Scientific, Singapore, 1988).

[c2] D. R. Nelson and B. I. Halperin, Phys. Rev. B 21, 5312 (1980).

[c3] S. Krishna Prasad, D. S. Shankar Rao, S. Chandrasekhar, M. E. Neubert, and J. W. Goodby, Phys. Rev. Lett. 74, 270 (1995).

[c4] H. Yao, T. Chan, and C. W. Garland, Phys. Rev. E 51, 4585 (1995).

[c5] J. D. Brock, A. Aharony, R. J. Birgeneau, K. W. Evans-Lutterodt, J. D. Litster, P. M. Horn, G. B. Stephenson, and A. R. Tajbakhsh, Phys. Rev. Lett. 57, 98 (1986); J. D. Brock, R. J. Birgeneau, J. D. Litster, and A. Aharony, Contemp. Phys. 5, 321 (1989).

[c6] J. V. Selinger and D. R. Nelson, Phys. Rev. Lett. 61, 416 (1988); Phys. Rev. A 39, 3135 (1989).

[c7] J. V. Selinger, J. Phys. II 1, 1363 (1991).

[c8] S. B. Dierker and R. Pindak, Phys. Rev. Lett. 56, 1819 (1986).

[c9] S. Gierlotka, J. Przedmojski, and B. Pura, Liq. Cryst. 3, 1535 (1988).

[c10] D. A. Dunmur, D. A. Hitchen, and M. R. Manterfield, J. Phys. E 20, 866 (1987).

[c11] See, e.g., N. E. Hill, W. E. Vaughan, A. H. Price, and M. Davies, Dielectric Properties and Molecular Behaviour (Van Nostrand, New York, 1969), p. 49ff.

[c12] P. E. Cladis, W. Van Saarloos, D. A. Huse, J. S. Patel, J. W. Goodby, and P. L. Finn, Phys. Rev. Lett. 62, 1764 (1989).

[c13] P. C. Hohenberg and B. I. Halperin, Rev. Mod. Phys. 49, 435 (1977).

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Dielectric investigations of the dynamics of the hexatic-hexatic transition in a chiral liquid crystal

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