Multicritical behavior of Abrikosov vortex lattices near the cholesteric–smectic-A–smectic-C*point

The commensurate and incommensurate TGBC^* liquid crystal phases

“…It also indicates that, in our simplified model, q is in the same range of magnitude as Q. Such a behavior is consistent, but not quite satisfactorily with the reasonable feeling, also discussed in [7], that one should observe a secondary wave vector q, smaller than the main one, Q. Clearly, the one elastic constant model discussed here, cannot yield the exact value of q/Q.…”

The commensurate and incommensurate TGBC^* liquid crystal phases

“…It also indicates that, in our simplified model, q is in the same range of magnitude as Q. Such a behavior is consistent, but not quite satisfactorily with the reasonable feeling, also discussed in [7], that one should observe a secondary wave vector q, smaller than the main one, Q. Clearly, the one elastic constant model discussed here, cannot yield the exact value of q/Q.…”

Characteristics of electrical properties of wide temperature range TGB phases in liquid crystal dimers

“…The similar observations have also been reported in litera− ture for TGB systems [10,11]. It is important to note that most of the TGB−TGB transitions have been predicted to be second order [2,5] but experimentally they have been found to be weakly first order transitions with transition width of the order of 0.2 to 0.5°C in extremely pure samples as well as in the mixtures [3,4,9].…”

Phase transition between the cholesteric and twist grain boundaryCphases

“…1 for the N * -T GB C transition, taking into account the recent proof of the stability of the T GB Ct phase [7,17] that was not considered in [15]. We confirm and expand the estimation of [15] to the whole region of parameters. In addition we calculate the principal parameters of the T GB Ct phase: upper critical temperature, slab width l b and the X-ray diffraction pattern that can be measured experimentally.…”

The commensurate and incommensurate TGBC^* liquid crystal phases

“…It also indicates that, in our simplified model, q is in the same range of magnitude as Q. Such a behavior is consistent, but not quite satisfactorily with the reasonable feeling, also discussed in [7], that one should observe a secondary wave vector q, smaller than the main one, Q. Clearly, the one elastic constant model discussed here, cannot yield the exact value of q/Q.…”

Characteristics of electrical properties of wide temperature range TGB phases in liquid crystal dimers

“…The similar observations have also been reported in litera− ture for TGB systems [10,11]. It is important to note that most of the TGB−TGB transitions have been predicted to be second order [2,5] but experimentally they have been found to be weakly first order transitions with transition width of the order of 0.2 to 0.5°C in extremely pure samples as well as in the mixtures [3,4,9].…”

Phase transition between the cholesteric and twist grain boundaryCphases

“…1 for the N * -T GB C transition, taking into account the recent proof of the stability of the T GB Ct phase [7,17] that was not considered in [15]. We confirm and expand the estimation of [15] to the whole region of parameters. In addition we calculate the principal parameters of the T GB Ct phase: upper critical temperature, slab width l b and the X-ray diffraction pattern that can be measured experimentally.…”

The commensurate and incommensurate TGBC^* liquid crystal phases

“…It also indicates that, in our simplified model, q is in the same range of magnitude as Q. Such a behavior is consistent, but not quite satisfactorily with the reasonable feeling, also discussed in [7], that one should observe a secondary wave vector q, smaller than the main one, Q. Clearly, the one elastic constant model discussed here, cannot yield the exact value of q/Q.…”

Characteristics of electrical properties of wide temperature range TGB phases in liquid crystal dimers

“…The similar observations have also been reported in litera− ture for TGB systems [10,11]. It is important to note that most of the TGB−TGB transitions have been predicted to be second order [2,5] but experimentally they have been found to be weakly first order transitions with transition width of the order of 0.2 to 0.5°C in extremely pure samples as well as in the mixtures [3,4,9].…”

Phase transition between the cholesteric and twist grain boundaryCphases

“…1 for the N * -T GB C transition, taking into account the recent proof of the stability of the T GB Ct phase [7,17] that was not considered in [15]. We confirm and expand the estimation of [15] to the whole region of parameters. In addition we calculate the principal parameters of the T GB Ct phase: upper critical temperature, slab width l b and the X-ray diffraction pattern that can be measured experimentally.…”