Temperature Dependence of the Elastic Constants for Biaxial Nematic Liquid Crystals | Zendy

Monselesan D. | Zendy; Trebin H.R. | Zendy

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Temperature Dependence of the Elastic Constants for Biaxial Nematic Liquid Crystals

Author(s) -

Monselesan D.,

Trebin H.R.

Publication year - 1989

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2221550203

Subject(s) - liquid crystal , condensed matter physics , order (exchange) , materials science , constant (computer programming) , biaxial nematic , thermodynamics , energy (signal processing) , energy density , physics , quantum mechanics , theoretical physics , programming language , finance , economics , computer science

The elastic constants K ij of the Frank‐Oseen energy density for uniaxial nematic liquid crystals depend on the Maier‐Saupe order parameter S and hence on temperature. Longa et al. recently used an extended Landau‐Ginzburg‐de Gennes theory to expand the functions K ij (S) up to fourth order in S . Here, a similar procedure is applied for the elastic energy density of biaxial nematic liquid crystals. The three chiral and 15 achiral constants are expressed as fourth‐order polynomials in the order parameter S and the degree of biaxiality T . Via the temperature dependence of the quantities S and T also the temperature dependence of the elastic constants is fixed.

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