title: Pressure effect on the rotator-II to rotator-I transition of alkanes.
abstract: We examine the effect of pressure on the rotator-II (R(II)) to rotator-I (R(I)) (R(II)-R(I)) transition within Landau phenomenological theory. The influence of pressure on the R(II)-R(I) transition is discussed by varying the coupling between the lattice distortion and the area/molecule. The pressure dependence of the area/molecule and the lattice distortion are calculated near the R(II)-R(I) transition. The R(II)-R(I) transition is found to be first order even at elevated pressure. The Landau coefficients are calculated from the experimental data. The theoretical results are in good agreement with available experimental results.
authors.affiliation: Department of Physics, Presidency College, 86/1 College Street, Kolkata 700 073, India. pkmukherje@yahoo.co.in
authors.forename: Prabir K
authors.initials: PK
authors.lastname: Mukherjee