Field percolation-switching in soft ternary anisotropic system

Abstract —A 2D anisotropic system of S = 1 centers of the charge triplet type in systems with variable valence or “semi-hard-core” boson systems with a limitation for the occupation of lattice sites n = 0, 1, 2 is studied in the framework of the pseudospin formalism. Assuming that the ground state is a quantum paramagnet, the pseudo-spin wave spectrum and also the conditions of the condensation of pseudomagnons with a phase transition to a superconducting state have been found using the Schwinger boson method.

Download Full-text

Exciton binding energies in GaAs films on AlxGa1−xAs substrates

International Journal of Modern Physics B ◽

10.1142/s0217979215502136 ◽

2015 ◽

Vol 29 (30) ◽

pp. 1550213 ◽

Cited By ~ 4

Author(s):

Zhenhua Wu ◽

Lei Chen ◽

Qiang Tian

Keyword(s):

Film Thickness ◽

Significant Influence ◽

Heavy Hole ◽

Dimensional Space ◽

Light Hole ◽

Binding Energies ◽

Substrate Thickness ◽

Dimensional Approach ◽

Anisotropic System ◽

Gaas Films

We use the fractional–dimensional approach (FDA) to study exciton binding energies in GaAs films on [Formula: see text] substrates. In this approach, the Schrödinger equation for a given anisotropic system is solved in a noninteger-dimensional space where the interactions are assumed to occur in an isotropic effective environment. The heavy-hole and light-hole exciton binding energies are calculated as functions of the film thickness and substrate thickness. The numerical results show that both the heavy-hole and light-hole exciton binding energies decrease monotonously as the film thickness increases. When the film thickness and the substrate thickness is relatively small, the change of substrate thickness has comparatively remarkable influence on both heavy-hole and light-hole exciton binding energies. As the substrate thickness increases, both the heavy-hole and light-hole exciton binding energies increase gradually. When the film thickness or the substrate thickness is relatively large, the change of substrate thickness has no significant influence on both heavy-hole and light-hole exciton binding energies.

Download Full-text

The Hall effect in the organic conductor TTF–TCNQ: choice of geometry for accurate measurements of a highly anisotropic system

Journal of Physics Condensed Matter ◽

10.1088/0953-8984/24/4/045602 ◽

2012 ◽

Vol 24 (4) ◽

pp. 045602 ◽

Cited By ~ 1

Author(s):

E Tafra ◽

M Čulo ◽

M Basletić ◽

B Korin-Hamzić ◽

A Hamzić ◽

...

Keyword(s):

Hall Effect ◽

Organic Conductor ◽

Anisotropic System

Download Full-text

An Improved 6DOF Electromagnetic Tracking Algorithm with Anisotropic System Parameters

Technologies for E-Learning and Digital Entertainment - Lecture Notes in Computer Science ◽

10.1007/11736639_144 ◽

2006 ◽

pp. 1141-1150 ◽

Cited By ~ 2

Author(s):

Yan Zhigang ◽

Yuan Kui

Keyword(s):

Tracking Algorithm ◽

Electromagnetic Tracking ◽

System Parameters ◽

Anisotropic System

Download Full-text

Effect of Anisotropy on the Critical Behaviour of Three- Dimensional Heisenberg Ferromagnets

Zeitschrift für Naturforschung A ◽

10.1515/zna-1976-0104 ◽

1976 ◽

Vol 31 (1) ◽

pp. 34-40 ◽

Cited By ~ 3

Author(s):

R. Shanker ◽

R. A. Singh

Keyword(s):

Three Dimensional ◽

Experimental Investigations ◽

Isotropic Case ◽

Zero Field ◽

Critical Temperatures ◽

Cubic Lattice ◽

Simple Cubic ◽

Simple Cubic Lattice ◽

Anisotropic System ◽

Critical Temperature Tc

The anisotropic nearest-neighbour Heisenberg model for the simple cubic lattice has been investigated by interpolating the anisotropy between the Ising and isotropic Heisenberg limits via general spin high-temperature series expansions of the zero-field suspectibility. This is done by estimating the critical temperature (Tc(3)) and the susceptibility exponent γ from the analysis of the series by the Ratio and Pade approximants methods. It is noted that Tc(3) varies with anisotropy while γ is almost the same for the anisotropic system, and a jump in it occurs for the isotropic case in agreement with the universality hypothesis. The effect of anisotropy on the susceptibility is also shown. Further, it is seen that estimates of γ for the two extreme limits agree well with those of previous theoretical as well as experimental investigations. In addition, critical temperatures have been summarised in a relation, and expressions for the magnetisation have been derived.

Download Full-text