Rollmann, Georg; Gruner, Markus Ernst; Hucht, Alfred; Meyer, Ralf; Entel, Peter; Tiago, Murilo L.; Chelikowsky, James R.:
Shellwise Mackay Transformation in Iron Nanoclusters
2007
In: Physical Review Letters, Band 99 (2007), S. 083402
Artikel/Aufsatz in Zeitschrift / Fach: Physik
Titel:
Shellwise Mackay Transformation in Iron Nanoclusters
Autor(in):
Rollmann, Georg; Gruner, Markus Ernst im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Hucht, Alfred im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Meyer, Ralf im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Entel, Peter im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Tiago, Murilo L.; Chelikowsky, James R.
Erscheinungsjahr:
2007
Erschienen in:
Physical Review Letters, Band 99 (2007), S. 083402
DOI:

Abstract:

Structure and magnetism of iron clusters with up to 641 atoms have been investigated by means of density functional theory calculations including full geometric optimizations. Body-centered cubic (bcc) isomers are found to be lowest in energy when the clusters contain more than about 100 atoms. In addition, another stable conformation has been identified for magic-number clusters, which lies well within the range of thermal energies as compared to the bcc isomers. Its structure is characterized by a close-packed particle core and an icosahedral surface, while intermediate shells are partially transformed along the Mackay path between icosahedral and cuboctahedral geometry. The gradual transformation results in a favorable bcc environment for the subsurface atoms. For Fe55, the shellwise Mackay-transformed morphology is a promising candidate for the ground state.