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Now showing items 1-10 of 19

#### A Monte Carlo study of the BNNNI model

(IOP Publishing, 1989)

The biaxially next-nearest-neighbour Ising (BNNNI) model is studied using the Monte Carlo procedure. The structure factor is used to identify the possible phases of the system. At intermediate temperatures, evidence for ...

#### Quantum mechanical simulation of charge transport in very small semiconductor structures

(IEEE, 1989)

A quantum mechanical simulation method of charge transport in very small semiconductor devices, based on the numerical solution of the time-dependent Schrödinger equation (coupled self-consistently to the Poisson equation ...

#### A renormalisation group study of the BNNNI model

(IOP Publishing, 1989)

The phase diagram of the two-dimensional biaxially next-nearest-neighbour king
(BNNNI) model is obtained using the real-space renormalisation group method with the
mean-field approximation. The transitions between ...

#### Simulated annealing for texture segmentation with Markov models

(IEEE, 1989)

Binary textured images are segmented into regions of different textures. The binary Markov model is used, and model parameters are assumed to be unknown prior to segmentation. The parameters are estimated using a ...

#### Critical relaxation of the two-dimensional three-state Potts model with conserved dynamics

(Institute of Physics (Great Britain), 1988)

The dynamical critical exponent z is obtained using the finite-size scaling method for the two-dimensional three-state Potts model with conserved dynamics. It is observed that there is a change in the dynamical behaviour ...

#### Effects of the constriction geometry on quasi-one-dimensional transport: Adiabatic evolution and resonant tunneling

(American Physical Society, 1989)

The geometry of a constriction, which plays a crucial role in quasi-one-dimensional (quasi-D) ballistic transport, is investigated by performing calculations of the conductance. If the constriction becomes smoothly narrower ...

#### Surface metallization of silicon by potassium adsorption on Si(001)-(2×1)

(American Physical Society, 1988)

We present the detailed results of self-consistent and geometry-optimized total-energy, band-structure, and charge-density calculations for a potassium-covered Si(001)-(2×1) surface, and for an unsupported potassium ...

#### Effect of tip profile on atomic-force microscope images: a model study

(American Physical Society, 1988)

Adopting the empirical silicon interatomic potential of Stillinger and Weber, we investigate the effect of the tip profile on the atomic-force microscope images for a prototype system, Si(001)-(2×1), and conclude that the ...

#### Atomic theory of scanning tunneling microscopy

(American Physical Society, 1989)

We present a quantitative analysis of the modifications of the scanning-tunneling-microscopy images due to the local perturbations of the electronic states induced by the tip in close proximity to the sample surface. Using ...

#### Electronic structure of strained Sin / Gen (001) superlattices

(Pergamon Press, 1988)

Using the empirical tight binding method we have investigated the electronic properties of the Sin/Gen(001) strained superlattices as a function of the superlattice periodicity and the band misfit. For n ≥ 4 we have found ...