The Relevance of Long-Range Interactions in Diluted Magnetic Semiconductors

1986 ◽  
Vol 89 ◽  
Author(s):  
W. J. M. De Jonge ◽  
Twardowski A ◽  
Denissen C.J.M.
Keyword(s):  
Long Range ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Freezing Temperature ◽  
Magnetic Interactions ◽  
Radial Dependence ◽  
Range Interaction ◽  
Long Range Interactions ◽  
Long Range Interaction ◽  
Diluted Magnetic

AbstractData are presented yielding evidence on the long-range character of magnetic interactions in Diluted Magnetic Semiconductors. The radial dependence of these interactions is deduced from the concentration dependence of the freezing temperature. It is shown that calculations of the thermodynamic properties, which include this long-range interaction, are in fair agreement with the experimental data.

Analysis of long‐range magnetic interactions in diluted magnetic semiconductors (abstract)

1987 ◽  
Vol 61 (8) ◽  
pp. 3558-3558
Author(s):  
K. Kopinga ◽  
W. J. M. de Jonge ◽  
C. J. M. Denissen ◽  
V. A. M. Brabers ◽  
H. Nishihara ◽  
...  
Keyword(s):  
Long Range ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Magnetic Interactions ◽  
Diluted Magnetic

Statistical theory of adsorption with long-range interaction

1938 ◽  
Vol 34 (2) ◽  
pp. 238-252 ◽  
Author(s):  
J. S. Wang
Keyword(s):  
Statistical Theory ◽  
Long Range ◽  
Unit Area ◽  
Continuous Distribution ◽  
Lattice Points ◽  
Circular Region ◽  
Range Interaction ◽  
Dipole Interactions ◽  
Long Range Interactions ◽  
Long Range Interaction

The statistical theory of long-range interactions between adsorbed particles on a plane lattice is worked out approximately, by treating in detail the distribution of adsorbed particles among a few sites inside and on the boundary of a circular region, and regarding the distribution outside the circle as uniform and continuous with a density Kθ per unit area, where K is the number of lattice points per unit area and θ is the fraction of surface covered by adsorbed particles. The continuous distribution begins at a distance ρ from the centre of the circle, ρ being determined by the condition that the probability of occupation of a first shell site is equal to the probability θ of occupation of the central site. Using this method, general formulae for the adsorption isotherm and the heat of adsorption are obtained. Numerical applications for dipole interactions and for quadratic and hexagonal lattices are worked out in detail and the case in which the dipole moment varies with θ is discussed.

LONG-RANGE INTERACTIONS IN THE HELICOIDAL DNA DYNAMICS

2013 ◽  
Vol 27 (24) ◽  
pp. 1350143 ◽  
Author(s):  
MIRABEAU SAHA ◽  
TIMOLEON C. KOFANÉ
Keyword(s):  
Rna Polymerase ◽  
Long Range ◽  
Power Law ◽  
Dna Dynamics ◽  
Extended Version ◽  
Range Interaction ◽  
Dna Molecule ◽  
Long Range Interactions ◽  
Long Range Interaction

In this paper, the comparison between power-law long-range interaction and Kac–Baker long-range interaction in the DNA molecule is investigated. This is done by employing an extended version of spin-like model of the DNA molecule with long-range interaction between intra-strand nucleotides and helicoidal coupling between inter-strand nucleotides when an RNA-polymerase binds to the DNA at biological temperature. Results show that LRIs have an undeniable effect on the DNA dynamics and that one is free to use either PLLRI or KBLRI to study DNA behaviors.

Electronic Theory of Mn - Alloyed Diluted Magnetic Semiconductors

1986 ◽  
Vol 89 ◽  
Author(s):  
H. Ehrenreich ◽  
K. C. Hass ◽  
B. E. Larson ◽  
N. F. Johnson
Keyword(s):  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Tight Binding ◽  
Magnetic Interactions ◽  
Potential Approximation ◽  
Exchange Constants ◽  
Density Band ◽  
Level Model ◽  
Diluted Magnetic ◽  
Valence Bands

AbstractRecent calculations of the electronic structure and magnetic interactions in Mn - alloyed II-VI diluted magnetic semiconductors (DMS) are summarized. Detailed band structure results are obtained using an empirical tight-binding, coherent potential approximation approach with input from experiment and local spin density band calculations. The dominant magnetic interactions in these systems result from hybridization between spin-split Mn d states and sp valence bands. Superexchange between Mn moments is well described by a simple three-level model which yields accurate Mn - Mn exchange constants for a variety of II-VI DMS as well as the rocksalt insulators MnO and α-MnS.

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