We analyzed dopant segregation at semiconductor interfaces by equilibrating chemical potentials of dopants and electrons on each side of the interface. We apply the theory to Si/strained-SiGe interfaces and compare the predictions with existing experimental data. The calculations include changes in effective density of states with particular attention to high-temperature hole effective mass , b...

The deformation potentials a, b and d for GaAs have been determined from polarized photoluminescence measurements upon a set of epitaxially grown strained.GaAs structures possessing varying levels of compressive biaxial lattice strain. X-ray diffraction measurements yield values for the degree of lattice strain while the polarized photoluminescence measurements permit a separate determination o...

Lattice discretization of the supersymmetric Yang-Mills quantum mechanics is reviewed and results of the Monte Carlo simulations of the simplified model are presented. The D=4, N=2, quenched system, studied at finite temperature, reveals existence of the two distinct regions which may correspond to a black hole and the elementary 0-branes phases of the M-theory conjectured in the literature. Ne...

We consider quantum simulations of nuclear matter on the lattice. In particular, we address the problem of calculating the contribution of nucleon/nucleon-hole loops at nonzero nucleon density. With the help of auxiliary boson fields, all nucleon interactions can be written in terms of one-body interactions in a fluctuating background. In the grand canonical ensemble, the contribution of nucleo...

Using the description in terms of the Hubbard operators hole and spin Green’s functions of the two-dimensional t-J model are calculated in an approximation which retains the rotation symmetry of the spin susceptibility in the paramagnetic state and has no predefined magnetic ordering. In this approximation, Green’s functions are represented by continued fractions which are interrupted with the ...

A bstract We study the confinement/deconfinement transition in D0-brane matrix model (often called BFSS model) and its one-parameter deformation (the BMN numerically by lattice Monte Carlo simulations. Our results confirm general expectations from dual string/M-theory picture for strong coupling. In particular, we observe confined phase model, which is a nontrivial consequence of M-theory pictu...

We have studied the three-band Peierls-Hubbard model describing the Cu-O layers in high-T c superconductors by using Lanczos diagonalization and assuming infinite mass for the ions. When the system is doped with one hole, and for λ (the electron-lattice coupling strength) greater than a critical value, we found that the oxygens around one Cu contract and the hole self-traps forming a lattice an...

In this paper we study the effect of next-nearest-neighbor hopping on the dynamics of a single hole in an antiferromagnetic (Néel) background. In the framework of large dimensions the Green function of a hole can be obtained exactly. The exact density of states of a hole is thus calculated in large dimensions and on a Bethe lattice with large coordination number. We suggest a physically motivat...