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- Forschungszentrum JülichDE159 papers
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4 papers · 1 filter
Full density matrix numerical renormalization group calculation of impurity susceptibility and specific heat of the Anderson impurity model
L. Merker, A. Weichselbaum, T. A. Costi
Recent developments in the numerical renormalization group (NRG) allow the construction of the full density matrix (FDM) of quantum impurity models (see A. Weichselbaum and J. von…
Numerical renormalization group calculation of impurity internal energy and specific heat of quantum impurity models
L. Merker, T. A. Costi
We introduce a method to obtain the specific heat of quantum impurity models via a direct calculation of the impurity internal energy requiring only the evaluation of local quantit…
Geometric reconstruction methods for electron tomography
Andreas Alpers, Richard J. Gardner, Stefan König +5
Electron tomography is becoming an increasingly important tool in materials science for studying the three-dimensional morphologies and chemical compositions of nanostructures. The…
Spatially controlled formation of superparamagnetic (Mn,Ga)As nanocrystals in high temperature annealed (Ga,Mn)As/GaAs superlattices
J. Sadowski, J. Z. Domagala, R. Mathieu +2
The annealing-induced formation of (Mn,Ga)As nanocrystals in (Ga,Mn)As/GaAs superlattices was studied by X-ray diffraction, transmission electron microscopy and magnetometry. The s…