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8 papers · 2 filters
Impact of the inherent periodic structure on the effective medium description of left-handed and related meta-materials
Th. Koschny, P. Markos, E. N. Economou +3
We study the frequency dependence of the effective electromagnetic parameters of left-handed and related meta-materials of the split ring resonator and wire type. We show that the…
Structure of Si(114) determined by global optimization methods
F. C. Chuang, C. V. Ciobanu, C. Predescu +2
In this article we report the results of global structural optimization of the Si(114) surface, which is a stable high-index orientation of silicon. We use two independent procedur…
Absence of magnetic moments in plutonium
J. C. Lashley, A. C. Lawson, R. J. McQueeney +1
Many theories published in the last decade propose that either ordered or disordered local moments are present in elemental plutonium at low temperatures. We present new experiment…
Finding the reconstructions of semiconductor surfaces via a genetic algorithm
F. C. Chuang, C. V. Ciobanu, V. B. Shenoy +2
In this article we show that the reconstructions of semiconductor surfaces can be determined using a genetic procedure. Coupled with highly optimized interatomic potentials, the pr…
Role of Disorder in Mn:GaAs, Cr:GaAs, and Cr:GaN
J. L. Xu, M. van Schilfgaarde, G. D. Samolyuk
We present calculations of magnetic exchange interactions and critical temperature T_c in Mn:GaAs, Cr:GaAs and Cr:GaN. The local spin density approximation is combined with a linea…
Electric coupling to the magnetic resonance of split ring resonators
N. Katsarakis, T. Koschny, M. Kafesaki +2
We study both theoretically and experimentally the transmission properties of a lattice of split ring resonators (SRRs) for different electromagnetic (EM) field polarizations and p…