CALCULATION OF THE PHASE DIAGRAM OF n-ALKANES (CnH2n+2) BY THE LANDAU MEAN FIELD THEORY

2022 ◽  
pp. 113377
Author(s):  
H. Yurtseven ◽  
E. Kilit Dogan
Keyword(s):  
Field Theory ◽  
Phase Diagram ◽  
Mean Field Theory ◽  
Mean Field

Pinwheel and herringbone structures of planar rotors with anisotropic interactions on a triangular lattice with vacancies

1984 ◽  
Vol 62 (9) ◽  
pp. 915-934 ◽  
Author(s):  
A. B. Harris ◽  
O. G. Mouritsen ◽  
A. J. Berlinsky
Keyword(s):  
Field Theory ◽  
Phase Diagram ◽  
Spin Wave ◽  
Triangular Lattice ◽  
Mean Field Theory ◽  
Mean Field ◽  
Wave Theory ◽  
Finite Domain ◽  
Unexpected Result ◽  
Spin Wave Theory

A variety of theoretical techniques, including Monte Carlo (MC), mean field theory, and spin-wave theory, are used to analyze the phase diagram of a system of planar rotors on a triangular lattice with vacancies. A simple anisotropic interaction, which mimics the electric quadrupole–quadrupole interaction for diatomic molecules confined to rotate in the plane of the surface, induces a herringbone-ordered structure for the pure (x = 1) system, whereas for x ≈ 0.75, if the vacancies are free to move, a 2 × 2 pinwheel structure is favored. For x = 0.75, MC calculations give a continuous transition with Ising exponents in agreement with renormalization group predictions for this universality class, the Heisenberg model with corner-type cubic anisotropy. Mean field theory gives the unexpected result that the pinwheel phase is stable only along the herringbone-disordered state coexistence line in the temperature versus chemical potential phase diagram. Spin-wave theory is used to show that there is, in fact, a finite domain of stability for the pinwheel phase, and a complete phase diagram, which encompasses all available information, is conjectured.

Mean-field theory of the phase diagram of ultrasoft, oppositely charged polyions in solution

2012 ◽  
Vol 137 (9) ◽  
pp. 094905 ◽  
Author(s):  
Arash Nikoubashman ◽  
Jean-Pierre Hansen ◽  
Gerhard Kahl
Keyword(s):  
Field Theory ◽  
Phase Diagram ◽  
Mean Field Theory ◽  
Mean Field ◽  
Oppositely Charged

A temperature–concentration (T–X) phase diagram calculated using the mean field theory for liquid crystals

2013 ◽  
Vol 19 (6) ◽  
pp. 2473-2483
Author(s):  
Hamit Yurtseven ◽  
Selami Salihoglu ◽  
Huseyin Karacali
Keyword(s):  
Field Theory ◽  
Phase Diagram ◽  
Liquid Crystals ◽  
Mean Field Theory ◽  
Mean Field ◽  
The Mean

scholarly journals Metal-insulator and magnetic phase diagram of Ca2RuO4 from auxiliary field quantum Monte Carlo and dynamical mean field theory

2020 ◽  
Vol 101 (23) ◽  
Author(s):  
Hongxia Hao ◽  
Antoine Georges ◽  
Andrew J. Millis ◽  
Brenda Rubenstein ◽  
Qiang Han ◽  
...  
Keyword(s):  
Field Theory ◽  
Phase Diagram ◽  
Monte Carlo ◽  
Quantum Monte Carlo ◽  
Magnetic Phase ◽  
Mean Field Theory ◽  
Mean Field ◽  
Magnetic Phase Diagram ◽  
Dynamical Mean Field Theory ◽  
Metal Insulator

THE MEAN-FIELD THEORY OF DIRECTED POLYMERS IN RANDOM MEDIA AND SPIN GLASS MODELS

1995 ◽  
Vol 07 (02) ◽  
pp. 183-192 ◽  
Author(s):  
F. KOUKIOU
Keyword(s):  
Field Theory ◽  
Phase Diagram ◽  
Spin Glass ◽  
Spin Glasses ◽  
Random Media ◽  
Random Medium ◽  
Mean Field Theory ◽  
Mean Field ◽  
Directed Polymers ◽  
The Mean

We give a unifying framework for the mean-field theory for models of spin glasses and directed polymers in a random medium defined on homogeneous graphs. Their phase diagram is studied in the complex plane of temperature.

Calculation of the T–P phase diagram for oxygen using the mean field theory

Calphad ◽  
2015 ◽  
Vol 51 ◽  
pp. 272-281 ◽  
Author(s):  
H. Yurtseven ◽  
M.G. Şenol
Keyword(s):  
Field Theory ◽  
Phase Diagram ◽  
Mean Field Theory ◽  
Mean Field ◽  
The Mean
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