A field theory of random heteropolymers near solid surfaces: Analysis of interfacial organization and adsorption–desorption phase diagram

1995 ◽  
Vol 103 (24) ◽  
pp. 10733-10750 ◽  
Author(s):  
Lorin Gutman ◽  
Arup K. Chakraborty
Keyword(s):  
Field Theory ◽  
Phase Diagram ◽  
Solid Surfaces ◽  
Adsorption Desorption

Adsorption-desorption processes on solid surfaces.

1983 ◽  
Vol 139 (4) ◽  
pp. 736
Author(s):  
V.N. Ageev ◽  
E.Ya. Zandberg ◽  
N.I. Ionov ◽  
A.Ya. Tontegode
Keyword(s):  
Solid Surfaces ◽  
Adsorption Desorption

MAGNETIC PROPERTIES OF PSEUDO-BINARY Mn1−xFexSn2 ALLOYS

1993 ◽  
Vol 07 (01n03) ◽  
pp. 867-870 ◽  
Author(s):  
H. SHIRAISHI ◽  
T. HORI ◽  
Y. YAMAGUCHI ◽  
S. FUNAHASHI ◽  
K. KANEMATSU
Keyword(s):  
Field Theory ◽  
Phase Diagram ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
High Temperature ◽  
Magnetic Structure ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
Molecular Field ◽  
Magnetic Phases

The magnetic susceptibility measurements have been made on antiferromagnetic compounds Mn1–xFexSn2 and the magnetic phase diagram was illustrated. The high temperature magnetic phases I and III, major phases, were analyzed on the basis of molecular field theory and explained the change of magnetic structure I⇌III occured at x≈0.8.

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.

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