Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

The smectic ZA phase: Antiferroelectric smectic order as a prelude to the ferroelectric nematic

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America

We have structurally characterized the liquid crystal (LC) phase that can appear as an intermediate state when a dielectric nematic, having polar disorder of its molecular dipoles, transitions to the almost perfectly polar-ordered ferroelectric nematic. This intermediate phase, which fills a 100-y-old void in the taxonomy of smectic LCs and which we term the “smectic ZA,” is antiferroelectric, with the nematic director and polarization oriented parallel to smectic layer planes, and the polarization alternating in sign from layer to layer with a 180 Å period. A Landau free energy, originally derived from the Ising model of ferromagnetic ordering of spins in the presence of dipole–dipole interactions, and applied to model incommensurate antiferroelectricity in crystals, describes the key features of the nematic–SmZA–ferroelectric nematic phase sequence.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
AC02-05CH11231; SC0012704
OSTI ID:
2000497
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 8 Vol. 120; ISSN 0027-8424
Publisher:
National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English

References (63)

Ferroelectric and Antiferroelectric Liquid Crystals book January 1999
A Fluid Liquid-Crystal Material with Highly Polar Order journal October 2017
Multiple Polar and Non‐polar Nematic Phases journal November 2021
An analogy between superconductors and smectics A journal May 1972
Critical phenomena in dipolar magnets journal February 1986
Experimental studies of structurally incommensurate crystal phases journal January 1990
Weak crystallization theory journal June 1993
Incommensurate Phase in NaNO2 book January 1986
Calamitic Bolaamphiphiles with (Semi)Perfluorinated Lateral Chains:  Polyphilic Block Molecules with New Liquid Crystalline Phase Structures journal August 2003
On the molecular origins of the ferroelectric splay nematic phase journal August 2021
Nano-clustering mediates phase transitions in a diastereomerically-stabilized ferroelectric nematic system journal November 2022
Bent-core liquid crystals: polar order, superstructural chirality and spontaneous desymmetrisation in soft matter systems journal January 2006
A nematic to nematic transformation exhibited by a rod-like liquid crystal journal January 2017
Electric field phase diagram of thiourea determined by optical birefringence journal January 1981
Phase diagram of thiourea at atmospheric pressure under electric field : a theoretical analysis journal January 1981
First-principles experimental demonstration of ferroelectricity in a thermotropic nematic liquid crystal: Polar domains and striking electro-optics journal June 2020
Polar in-plane surface orientation of a ferroelectric nematic liquid crystal: Polar monodomains and twisted state electro-optics journal May 2021
Theory of the intermediate rippled phase of phospholipid bilayers. journal October 1984
Satellite X-ray scattering and structural modulation of thiourea journal October 1971
Director and layer structure of SSFLC cells journal September 1988
Chevron layer structures in surface stabilized ferroelectric liquid crystal (SSFLC) cells filled with a material which exhibits the chiral nematic to smectic C*phase transition journal January 1991
Structural variants ofRM734in the design of splay nematic materials journal June 2021
Ideal mixing of paraelectric and ferroelectric nematic phases in liquid crystals of distinct molecular species journal May 2022
Layer and director structure in surface stabilized ferroelectric liquid crystal cells with non-planar boundary conditions journal January 1989
The Polymorphism of Liquid Crystals journal December 1966
A structural viewpoint on the sine-Gordon equation in incommensurate phases journal July 1995
Smectic-C‘‘chevron,’’ a planar liquid-crystal defect: Implications for the surface-stabilized ferroelectric liquid-crystal geometry journal February 1988
Modulated structures in tilted chiral smectic films journal April 1992
High-resolution x-ray study of a smectic- A —smectic- C phase transition journal May 1980
Rippled commensurate state: A possible new type of incommensurate state journal April 1984
Intrinsic domain-wall pinning and spatial chaos in continuum models of one-dimensionally incommensurate systems journal May 1986
Transitions and modulated phases in centrosymmetric ferroelectrics: Mean-field and renormalization-group predictions journal February 1988
Domain-wall pinning in the incommensurate phase of sodium nitrite journal April 1988
Phenomenological model for type-II incommensurate phases having a soliton regime: Thiourea case journal January 1994
Striped phases in two-dimensional dipolar ferromagnets journal June 1995
Magnetic hysteresis in an Ising-like dipole-dipole model journal September 1998
Lattice models and Landau theory for type-II incommensurate crystals journal August 2000
Phase diagram of an Ising model for ultrathin magnetic films: Comparing mean field and Monte Carlo predictions journal June 2007
Critical Behavior of Magnets with Dipolar Interactions. V. Uniaxial Magnets indDimensions journal October 1973
Q-tensor model of twist-bend and splay nematic phases journal February 2020
Theory of the splay nematic phase: Single versus double splay journal May 2020
Stability of the uniform ferroelectric nematic phase journal January 2021
Ferroelectric nematic liquid-crystalline phases journal August 2022
Phase diagram of an Ising model with long-range frustrating interactions: A theoretical analysis journal December 2000
Monte Carlo study of the three-dimensional Coulomb frustrated Ising ferromagnet journal August 2001
Ferroelectric-Ferroelastic Phase Transition in a Nematic Liquid Crystal journal January 2020
Critical Behavior at the Onset of k → -Space Instability on the λ Line journal December 1975
Light-Scattering Study of a Smectic-APhase near the Smectic-A- Nematic Transition journal June 1976
Experimental Test of Renormalization Group Theory on the Uniaxial, Dipolar Coupled Ferromagnet LiTbF4 journal October 1976
Novel Class of Continuous Phase Transitions to Incommensurate Structures journal October 1986
"Chevron" Local Layer Structure in Surface-Stabilized Ferroelectric Smectic-CCells journal December 1987
Dipolar effects in magnetic thin films and quasi-two-dimensional systems journal January 2000
Mean field theory, the Ginzburg criterion, and marginal dimensionality of phase transitions journal June 1977
Development of ferroelectric nematic fluids with giant-ε dielectricity and nonlinear optical properties journal April 2021
Domain Shapes and Patterns: The Phenomenology of Modulated Phases journal January 1995
Structure of DNA-Cationic Liposome Complexes: DNA Intercalation in Multilamellar Membranes in Distinct Interhelical Packing Regimes journal February 1997
Critical behavior of isotropic three-dimensional systems with dipole-dipole interactions journal June 2013
Chevron Layer Structure in the Smectic A Phase of 8CB journal March 1989
Microdomain Structure in Paraelectric Phase of NaNO2 journal March 1961
Phase Transition in NaNO2 journal November 1963
Successive Phase Transitions in Ferroelectric NaNO2 and SC(NH2)2 journal August 1978
Phenomenological Theory of the Linear and Nonlinear Dielectric Susceptibilities in the Type-II Incommensurate Phase journal September 1998
Director Deformations, Geometric Frustration, and Modulated Phases in Liquid Crystals journal March 2022

Similar Records

New examples of ferroelectric nematic materials showing evidence for the antiferroelectric smectic-Z phase
Journal Article · Thu Feb 22 23:00:00 EST 2024 · Scientific Reports · OSTI ID:2311226