Do thermotropic biaxial nematics exist? A Monte Carlo study of biaxial Gay-Berne particles, J. Chem. Phys., 113, 5971-5979 (2000)
نویسندگان
چکیده
We have investigated with extensive Monte Carlo simulations in the isothermal isobaric ensemble a system of N = 8192 elongated attractive–repulsive biaxial Gay–Berne (GB) particles. We have found a uniaxial and biaxial nematic and a biaxial orthogonal smectic phase in this thermotropic model system.
منابع مشابه
Do thermotropic biaxial nematics exist? A Monte Carlo study of biaxial Gay–Berne particles
We have investigated with extensive Monte Carlo simulations in the isothermal isobaric ensemble a system of N = 8192 elongated attractive–repulsive biaxial Gay–Berne (GB) particles. We have found a uniaxial and biaxial nematic and a biaxial orthogonal smectic phase in this thermotropic model system.
متن کاملBiaxial Discotic Gay-berne Mesogens and Biaxial Nematics
We investigate the thermotropic liquid crystal phases formed in a system of biaxial discotic mesogenic Gay-Berne particles with strong in-plane interactions when the attractive and repulsive biaxialities have the same or the opposite sign. We find that a biaxial nematic phase is obtained when the shape and well depth anisotropies have the same sign while we do not observe a columnar phase.
متن کاملPhase diagram of the uniaxial and biaxial soft-core Gay-Berne model.
Classical molecular dynamics simulations have been used to explore the phase diagrams for a family of attractive-repulsive soft-core Gay-Berne models [R. Berardi, C. Zannoni, J. S. Lintuvuori, and M. R. Wilson, J. Chem. Phys. 131, 174107 (2009)] and determine the effect of particle softness, i.e., of a moderately repulsive short-range interaction, on the order parameters and phase behaviour of ...
متن کاملCan multi-biaxial mesogenic mixtures favour biaxial nematics? A computer simulation study.
Extending the range of existence of biaxial nematic phases is key to their use in applications. Here, we have investigated using extensive molecular dynamics (MD) simulations of a coarse-grained model the possible advantages of using mesogenic mixtures. We have studied the phase organisation of five thermotropic mixtures of biaxial Gay-Berne (GB) ellipsoidal particles having the same volume, bu...
متن کاملColumnar phases and Ðeld induced biaxiality of a Gay–Berne discotic liquid crystal
We have studied a system of discotic particles with a central transverse dipole using Monte Carlo (MC) computer simulations at constant pressure. We have investigated several temperatures corresponding to nematic and columnar liquid crystal phases and determined the molecular and dipolar organizations. Low temperature columnar phases are characterized by local biaxial ordering of dipoles, even ...
متن کامل