Abstract
A state-of-the-art calorimetric system has been established. The system enables us to measure simultaneously heat capacity and optical reflectivity of free-standing liquid-crystal films from many hundreds down to only two molecular layers in thickness. Our experimental results on the smectic-A-hexatic-B and smectic-C-smectic-I transitions cannot be described solely in terms of the creation of bond-orientational order, indicating that additional molecular order must be present in the hexatic phases of liquid crystals.
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References
M. J. Tejwani, O. Ferreira, and O. E. Vilches,Phys. Rev. Lett. 44:152 (1980).
B. I. Halperin and D. R. Nelson,Phys. Rev. Lett. 41:121, (1978): D. R. Nelson and B. J. Halperin.Phys. Rev. B 19:2457 (1979).
R. Pindak, D. E. Moncton, S. C. Davey, and J. W. Goodby,Phys. Rev. Lett. 46:1135 (1981).
R. J. Birgeneau and J. D. Litster,J. Phys. Lett. (Paris) 39:399 (1978).
M. Cheng, J. T. Ho, S. W. Hui, and R. Pindak,Phys. Rev. Lett. 61:550 (1988).
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).
C. C. Huang and T. Stoebe,Adv. Phys. 42:343 (1993).
G. Nounesis, R. Geer, H. Y. Liu, C. C. Huang, and J. W. Goodby,Phys. Rev. A 40:5468 (1989).
S. A. Solla and E. K. Riedel,Phys. Rev. B 23:6008 (1981).
R. Geer, T. Stocbe, T. Pitchford, and C. C. Huang,Rev. Sci. Instrumm. 62:415 (1991).
R. Geer, T. Stoebe, and C. C. Huang,Phys. Rev. E 48:408 (1993).
T. Stoebe, C. C. Huang, and J. W. Goodby,Phys. Rev. Lett. 68:2944 (1992).
R. Geer, T. Stoebe, C. C. Huang, R. Pindak, J. W. Goodby, M. Cheng, J. T. Ho, and S. W. Hui,Nature 355:152 (1992).
T. Stoebe, R. Geer, C. C. Huang, and J. W. Goodby,Phys. Rev. Lett. 69:2090 (1992).
T. Stoebe, A. J. Jin, P. Mach, and C. C. Huang,Int. J. Thermophys., in press.
T. Stoebe and C. C. Huang,Phys. Rev. E (RC) 50:R32 (1994).
I. M. Jiang, S. N. Huang, J. Y. Ko, T. Stoebe, A. J. Jin, and C. C. Huang,Phys. Rev. E (RC) 48:3240 (1993).
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Stoebe, T., Ho, J.T. & Huang, C.C. Heat capacity measurements of extremely thin substrate-free liquid-crystal films. Int J Thermophys 15, 1189–1197 (1994). https://doi.org/10.1007/BF01458827
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DOI: https://doi.org/10.1007/BF01458827