Showing 2007 · cond-mat.mtrl-sciShow all

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cond-mat.mtrl-sci2007★ 248 cited

Proving the Perdew-Burke-Ernzerhof density functional designed for metallic bulk and surface systems

M. Ropo, K. Kokko, L. Vitos

We test the accuracy of the revised Perdew-Burke-Ernzerhof exchange-correlation density functional (PBEsol) for metallic bulk and surface systems. It is shown that, on average, PBE…

cond-mat.mtrl-sci2007★ 4 cited

Effects of selective dilution on the magnetic properties of La_{0.7}Sr_{0.3}Mn_{1-x}M'_xO_3 (M' = Al, Ti)

D. N. H. Nam, N. V. Dai, L. V. Hong +4

The magnetic lattice of mixed-valence Mn ions in LaSrMnO is selectively diluted by partial substitution of Al or Ti for Mn. The ferromagnetic transition tempe…

cond-mat.mtrl-sci2007★ 49 cited

Anomalous thermal expansion in -titanium

P. Souvatzis, O. Eriksson, M. I. Katsnelson

We provide a complete quantitative explanation for the anisotropic thermal expansion of hcp Ti at low temperature. The observed negative thermal expansion along the c-axis is repro…

cond-mat.mtrl-sci2007★ 107 cited

Interface effects at a half-metal/ferroelectric junction

Kunihiko Yamauchi, Biplab Sanyal, Silvia Picozzi

Magnetoelectric effects are investigated ab-initio at the interface between half-metallic and ferroelectric prototypes: Heusler CoMnSi and perovskite BaTiO. For the Co-term…

cond-mat.mtrl-sci2007★ 90 cited

Sum-rules for electron energy-loss near-edge spectra

Ján Rusz, Olle Eriksson, Pavel Novák +1

We derive four sum-rule expressions for spectra measured in electron energy-loss near edge structure experiments. These sum-rules permit the determination spin and orbital magnetic…

cond-mat.mtrl-sci2007★ 313 cited

Dual nature of improper ferroelectricity in a magnetoelectric multiferroic

Silvia Picozzi, Kunihiko Yamauchi, Biplab Sanyal +2

Using first principles calculations, we study the microscopic origin of ferroelectricity (FE) induced by magnetic order in the orthorhombic HoMnO3. We obtain the largest ferroelect…

cond-mat.mtrl-sci2007★ 666 cited

Origin of magnetoelectric behavior in BiFeO

P. Ravindran, R. Vidya, A. Kjekshus +2

The magnetoelectric behavior of BiFeO has been explored on the basis of accurate density functional calculations. The structural, electronic, magnetic, and ferroelectric proper…

cond-mat.mtrl-sci2007★ 92 cited

First principles theory of chiral dichroism in electron microscopy applied to 3d ferromagnets

Jan Rusz, Stefano Rubino, Peter Schattschneider

Recently it was demonstrated (Schattschneider et al., Nature 441 (2006), 486), that an analogue of the X-ray magnetic circular dichroism (XMCD) experiment can be performed with the…

cond-mat.mtrl-sci2007★ 330 cited

Physisorption of Nucleobases on Graphene

S. Gowtham, Ralph H. Scheicher, Rajeev Ahuja +2

We report the results of our first-principles investigation on the interaction of the nucleobases adenine (A), cytosine (C), guanine (G), thymine (T), and uracil (U) with graphene,…

cond-mat.mtrl-sci2007★ 200 cited

High-pressure structural, elastic and electronic properties of the scintillator host material, KMgF_3

G. Vaitheeswaran, V. Kanchana, R. S. Kumar +5

The high-pressure structural behaviour of the fluoroperovskite KMgF_3 is investigated by theory and experiment. Density functional calculations were performed within the local dens…

cond-mat.mtrl-sci2007★ 71 cited

Elastic constants and high-pressure structural transitions in lanthanum monochalcogenides from experiment and theory

G. Vaitheeswaran, V. Kanchana, S. Heathman +5

The high-pressure structural behavior of lanthanum monochalcogenides is investigated by theory and experiment. Theory comprises density functional calculations of LaS, LaSe and LaT…