Solvent smectic order parameters from solute nematic order parameters

2008 ◽  
Vol 129 (9) ◽  
pp. 094509 ◽  
Author(s):  
Giorgio Celebre ◽  
Giorgio Cinacchi ◽  
Giuseppina De Luca
Keyword(s):  
Order Parameters ◽  
Nematic Order

Thermotropic biaxial nematic order parameters and phase transitions deduced by Raman scattering

2008 ◽  
Vol 82 (5) ◽  
pp. 56001 ◽  
Author(s):  
C. D. Southern ◽  
P. D. Brimicombe ◽  
S. D. Siemianowski ◽  
S. Jaradat ◽  
N. Roberts ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Raman Scattering ◽  
Order Parameters ◽  
Nematic Order ◽  
Biaxial Nematic

scholarly journals Impact of spherical nanoparticles on nematic order parameters

2018 ◽  
Vol 97 (4) ◽  
Author(s):  
C. Kyrou ◽  
S. Kralj ◽  
M. Panagopoulou ◽  
Y. Raptis ◽  
G. Nounesis ◽  
...  
Keyword(s):  
Order Parameters ◽  
Spherical Nanoparticles ◽  
Nematic Order

scholarly journals Transverse fields to tune an Ising-nematic quantum phase transition

2017 ◽  
Vol 114 (51) ◽  
pp. 13430-13434 ◽  
Author(s):  
Akash V. Maharaj ◽  
Elliott W. Rosenberg ◽  
Alexander T. Hristov ◽  
Erez Berg ◽  
Rafael M. Fernandes ◽  
...  
Keyword(s):  
Phase Transition ◽  
Quantum Phase Transition ◽  
Order Parameter ◽  
Point Group ◽  
Transverse Field ◽  
Order Parameters ◽  
Quantum Phase ◽  
Group Symmetry ◽  
Nematic Order ◽  
Transverse Fields

The paradigmatic example of a continuous quantum phase transition is the transverse field Ising ferromagnet. In contrast to classical critical systems, whose properties depend only on symmetry and the dimension of space, the nature of a quantum phase transition also depends on the dynamics. In the transverse field Ising model, the order parameter is not conserved, and increasing the transverse field enhances quantum fluctuations until they become strong enough to restore the symmetry of the ground state. Ising pseudospins can represent the order parameter of any system with a twofold degenerate broken-symmetry phase, including electronic nematic order associated with spontaneous point-group symmetry breaking. Here, we show for the representative example of orbital-nematic ordering of a non-Kramers doublet that an orthogonal strain or a perpendicular magnetic field plays the role of the transverse field, thereby providing a practical route for tuning appropriate materials to a quantum critical point. While the transverse fields are conjugate to seemingly unrelated order parameters, their nontrivial commutation relations with the nematic order parameter, which can be represented by a Berry-phase term in an effective field theory, intrinsically intertwine the different order parameters.

Phase transitions with coupled order parameters

1981 ◽  
Vol 133 (1) ◽  
pp. 103 ◽  
Author(s):  
M.A. Anisimov ◽  
E.E. Gorodetskii ◽  
V.M. Zaprudskii
Keyword(s):  
Phase Transitions ◽  
Order Parameters
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