منابع مشابه
Orbital-free kinetic-energy functionals for the nearly free electron gas
We present an improvement over the Wang-Teter, Perrot, and Smargiassi-Madden kinetic-energy functionals without going beyond linear-response theory and without introducing a density-dependent kernel. The improved functionals were tested on bulk aluminum, and excellent results were obtained. Accurate densityfunctional calculations using the new functionals on systems larger than one can study by...
متن کاملIn √ 7 × √ 3 on Si ( 111 ) : a nearly free electron metal in two dimensions
Eli Rotenberg, H. Koh, K. Rossnagel, H. W. Yeom, J. Schäfer, B. Krenzer , M. P. Rocha, S. D. Kevan MS 6-2100, Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA. 94720 Institute of Physics and Applied Physics, Yonsei University, 134 Sinchon-dong, Seodaemun-gu, Seoul 120-749, Korea Institute of Physics, University of Augsburg, Universitätsstraße 1, D-86159 Augsburg, Germa...
متن کاملPlasmons in sodium under pressure: increasing departure from nearly free-electron behavior.
We have measured plasmon energies in Na under high pressure up to 43 GPa using inelastic x-ray scattering (IXS). The momentum-resolved results show clear deviations, growing with increasing pressure, from the predictions for a nearly free-electron metal. Plasmon energy calculations based on first-principles electronic band structures and a quasiclassical plasmon model allow us to identify a pre...
متن کاملSurface states in nearly modulated systems.
A Landau model is used to study the phase behavior of the surface layer for magnetic and cholesteric liquid-crystal systems that are at or near a Lifshitz point marking the boundary between modulated and homogeneous bulk phases. The model incorporates surface and bulk fields and includes a term in the free energy proportional to the square of the second derivative of the order parameter in addi...
متن کاملImaging the dynamics of free-electron Landau states
Landau levels and states of electrons in a magnetic field are fundamental quantum entities underlying the quantum Hall and related effects in condensed matter physics. However, the real-space properties and observation of Landau wave functions remain elusive. Here we report the real-space observation of Landau states and the internal rotational dynamics of free electrons. States with different ...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2016
ISSN: 2469-9950,2469-9969
DOI: 10.1103/physrevb.93.205125