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26 papers · 1 filter
Density-Matrix-Power Functional: Performance for Finite Systems and the Homogeneous Electron Gas
N. N. Lathiotakis, S. Sharma, J. K. Dewhurst +3
An exchange correlation energy functional involving fractional power of the one-body reduced density matrix [Phys. Rev. B {\bf 78}, 201103 (2008)] is applied to finite systems and…
Lorentz shear modulus of fractional quantum Hall states
I. V. Tokatly, G. Vignale
We show that the Lorentz shear modulus of macroscopically homogeneous electronic states in the lowest Landau level is proportional to the bulk modulus of an equivalent system of in…
First-Principles conductance of nanoscale junctions from the polarizability of finite systems
Matthieu J. Verstraete, P. Bokes, R. W. Godby
A method for the calculation of the conductance of nanoscale electrical junctions is extended to ab-initio electronic structure methods and applied to realistic models of metallic…
Pfaffian and fragmented states at nu=5/2 in quantum Hall droplets
H. Saarikoski, E. Tolo, A. Harju +1
When a gas of electrons is confined to two dimensions, application of a strong magnetic field may lead to startling phenomena such as emergence of electron pairing. According to a…
Density gradients for the exchange energy of electrons in two dimensions
S. Pittalis, E. Rasanen, J. G. Vilhena +1
We derive a generalized gradient approximation to the exchange energy to be used in density functional theory calculations of two-dimensional systems. This class of approximations…
Correlation energy of two-dimensional systems: Toward non-empirical and universal modeling
S. Pittalis, E. Rasanen, C. Proetto +1
The capability of density-functional theory to deal with the ground-state of strongly correlated low-dimensional systems, such as semiconductor quantum dots, depends on the accurac…