337 citations · 2.1k across the 54 of their papers we have counts for
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Energy spectrum, persistent current and electron localization in quantum rings
M. Manninen, P. Koskinen, M. Koskinen +3
Energy spectra of quasi-one-dimensional quantum rings with a few electrons are studied using several different theoretical methods. Discrete Hubbard models and continuum models are…
Electron-hole bilayer quantum dots: Phase diagram and exciton localization
K. Karkkainen, M. Koskinen, M. Manninen +1
We studied a vertical ``quantum dot molecule'', where one of the dots is occupied with electrons and the other with holes. We find that different phases occur in the ground state,…
Close-Packing of Clusters: Application to Al_100
K. Manninen, J. Akola, M. Manninen
The lowest energy configurations of close-packed clusters up to N=110 atoms with stacking faults are studied using the Monte Carlo method with Metropolis algorithm. Two types of co…
Quantum rings for beginners: Energy spectra and persistent currents
S. Viefers, P. Koskinen, P. Singha Deo +1
Theoretical approaches to one-dimensional and quasi-one-dimensional quantum rings with a few electrons are reviewed. Discrete Hubbard-type models and continuum models are shown to…
Exchange-correlation energy of a multicomponent two-dimensional electron gas
K. Karkkainen, M. Koskinen, S. M. Reimann +1
We discuss the exchange-correlation energy of a multicomponent (multi-valley) two-dimensional electron gas and show that an extension of the recent parametrisation of the exchange-…
Persistent Currents in Small, Imperfect Hubbard Rings
P. Koskinen, M. Manninen
We have done a study with small, imperfect Hubbard rings with exact diagonalization. The results for few-electron rings show, that the imperfection, whether localized or not, nearl…