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Now showing items 1-10 of 72

#### Transmutation of the vicinal surface exponent due to gravity

(American Physical Society, 1988-04)

Near the edge of a facet, vicinal surfaces curve away from the plane with exponent (3/2. With gravity normal to the facet the exponent may change to 3. Generally, there will be a crossover from 3 to (3/2 as the facet edge ...

#### Extended and localized states in the periodic Anderson model

(American Physical Society, 1986-12)

The renormalized quasiparticle states are derived for a periodic Anderson model with a general hybridization matrix element between conduction electrons with two degrees of freedom and f electrons with N degrees of freedom. ...

#### Aging in coarsening diluted ferromagnets

(American Physical Society, 2010-10)

We comprehensively study nonequilibrium relaxation and aging processes in the two-dimensional randomsite Ising model through numerical simulations. We discuss the dynamical correlation length as well as scaling functions ...

#### Electron-energy-loss and optical-transmittance investigation of Bi2Sr2CaCu2O8

(American Physical Society, 1990-07)

The energy-loss function Im(-1/ε) of Bi2Sr2CaCu2O8 has been measured over the range Eloss=0.8 to 80 eV by transmission electron-energy-loss spectroscopy (EELS) (nonimaging). The energy and momentum resolution were 0.1 eV ...

#### Spin-charge separation in the two-dimensional Hubbard and t-J models at low electronic density

(American Physical Society, 1994-07)

The spin- and density-correlation functions of the two-dimensional Hubbard model at low electronic density [n] are calculated in the ground state by using the power method, and at finite temperatures by using the quantum ...

#### First-principles study of a single-molecule magnet Mn-12 monolayer on the Au(111) surface

(American Physical Society, 2007-12)

The electronic structure of a monolayer of single-molecule magnets Mn-12 on a Au(111) surface is studied using spin-polarized density-functional theory. The Mn-12 molecules are oriented such that the magnetic easy axis is ...

#### Superuniversality in phase-ordering disordered ferromagnets

(American Physical Society, 2008-12)

The phase-ordering kinetics of the ferromagnetic two-dimensional Ising model with uniform bond disorder is investigated by intensive Monte Carlo simulations. Simple aging behavior is observed in the single-time correlator ...

#### Effect of pressure on defect-related emission in heavily silicon-doped GaAs

(American Physical Society, 1994-11)

We report cryogenic high-pressure measurements of a defect-related emission at 1.25 eV in silicon-doped GaAs. The pressure measurements prove that the 1.25-eV photon energy is relative to the conduction band, implying a ...

#### Resonating-valence-bond wave function for the two-dimensional Heisenberg model on a triangular lattice

(American Physical Society, 1990-06)

A resonating-valence-bond (RVB) wave function for the triangular lattice is constructed by following the renormalized Hamiltonian approach (or Gutzwiller approximation) successfully developed for the square lattice. This ...

#### Two competing interactions in the Anderson lattice model

(American Physical Society, 1987-04)

The vertex function of the SU(N) Anderson lattice model is calculated by treating the intersite coupling perturbatively. There are two different scattering processes that contribute to the effective interactions. In one ...