Search Results - "Gidopoulos, N I"

Distinct magnetic phase transition at the surface of an antiferromagnet by Langridge, S, Watson, G M, Gibbs, D, Betouras, J J, Gidopoulos, N I, Pollmann, F, Long, M W, Vettier, C, Lander, G H

“…In the majority of magnetic systems the surface is required to order at the same temperature as the bulk. In the present Letter, we report a distinct and…”
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Size consistency of explicit functionals of the natural orbitals in reduced density matrix functional theory by Lathiotakis, N N, Gidopoulos, N I, Helbig, N

“…We report a size-inconsistency problem for several functionals within reduced density matrix functional theory. Being explicit functionals of the natural…”
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Optimized effective potential using the Hylleraas variational method by Hollins, T. W., Clark, S. J., Refson, K., Gidopoulos, N. I.

“…In electronic structure calculations the optimized effective potential (OEP) is a method that treats exchange interactions exactly using a local potential…”
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Ensemble-Hartree–Fock scheme for excited states. The optimized effective potential method by Gidopoulos, N.I., Papaconstantinou, P.G., Gross, E.K.U.

“…We review the ensemble-Hartree–Fock (eHF) scheme for excited states. The single-particle eHF equations contain different potentials for the various orbitals,…”
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Spurious interactions, and their correction, in the ensemble-Kohn-Sham scheme for excited States by Gidopoulos, N I, Papaconstantinou, P G, Gross, E K U

“…We observe that the direct Coulomb (Hartree) term appearing in the ensemble-density-functional theory for excited states contains an unphysical ("ghost")…”
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A local Fock-exchange potential in Kohn-Sham equations by Hollins, T. W, Clark, S. J, Refson, K, Gidopoulos, N. I

“…We derive and employ a local potential to represent the Fock exchange operator in electronic single-particle equations. This local Fock-exchange (LFX)…”
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Distinct Magnetic Phase Transition at the Surface of an Antiferromagnet by Langridge, S, Watson, G M, Gibbs, D, Betouras, J J, Gidopoulos, N I, Pollmann, F, Long, M W, Vettier, C, Lander, G H

“…In the majority of magnetic systems the surface is required to order at the same temperature as the bulk. In the present Letter, we report a distinct and…”
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Effect of quantization of vibrations on the structural properties of crystals by Scivetti, I, Gidopoulos, N. I, Kohanoff, J

“…We study the structural effects produced by the quantization of vibrational degrees of freedom in periodic crystals at zero temperature. To this end we…”
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Comment on "High energy neutron scattering from hydrogen using a direct geometry spectrometer". C. Stock, R A Cowley, J W Taylor and S M Bennington [arXiv:0907.1945] by Mayers, J, Gidopoulos, N. I, Adams, M, Reiter, G. F, Andreani, C, Senesi, R

“…The paper in the title [1] reports measurements of neutron scattering from hydrogen in the 1-100 eV range of energy transfers, using the direct geometry MARI…”
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Breakdown of the Born-Oppenheimer description explains neutron Compton-scattering anomaly by GIDOPOULOS, Nikitas I

“…Several neutron Compton scattering experiments reveal an apparent drop of the proton cross section when the collision time {tau}{sub q} is around 1 fs. Such…”
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Comment on “High-energy neutron scattering from hydrogen using a direct geometry spectrometer” by Mayers, J., Gidopoulos, N. I., Adams, M. A., Reiter, G., Andreani, C., Senesi, R.

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Unconstrained Variational Determination of the Kohn-Sham Potential by Gidopoulos, N. I

“…Density Functional Theory's Kohn-Sham (KS) potential emerges as the minimizing effective potential in an unconstrained variational scheme that does not involve…”
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Second virial coefficient of the interacting anyon gas by Gidopoulos, NI, Theophilou, AK

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