atomic clusters
1991-10
cavity
sodium atoms
stable configuration
ATOMIC clusters of sodium and other simple metals are known to exhibit a shell structure, giving rise to enhanced stability at certain 'magic numbers' of constituent atoms1–3. Balian and Bloch have shown4 that such shells are the likely result of particularly stable electronic structures: electrons in a spherical cavity (approximating the potential in the clusters) follow semiclassical triangular or square orbits, leading to a shell structure similar to that in atoms5, and stable configurations occur at magic numbers proportional to the cube root of the number of electrons. Balian and Bloch4 also predicted that the existence of both triangular and square orbits, with slightly different periodicities of their magic numbers, should lead to a 'quantum beating' effect that imposes a low-frequency envelope on the periodic variation in cluster stability with increasing size, in effect creating an additional 'supershell' structure. Here we report the observation of this supershell effect in sodium clusters with up to 3,000 constituent atoms.
electrons
1991-10-01
rise
articles
low-frequency envelope
structure
periodicity
stability
2022-10-01T06:28
https://scigraph.springernature.com/explorer/license/
observations
variation
magic numbers
false
number of electrons
existence
beating
sodium clusters
different periodicities
supershells
article
metals
enhanced stability
square orbits
results
cluster stability
shell
orbit
size
roots
sodium
atoms
envelope
Observation of quantum supershells in clusters of sodium atoms
constituent atoms
stable electronic structure
Balian
Bloch
quantum beating
effect
simple metals
733-735
cube root
likely results
clusters
such shells
supershell effect
shell structure
configuration
number
electronic structure
periodic variation
https://doi.org/10.1038/353733a0
spherical cavity
shown4
pub.1014270391
dimensions_id
The Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100, Copenhagen ø, Denmark
The Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100, Copenhagen ø, Denmark
Physical Sciences
Bjørnholm
S.
H. D.
Rasmussen
353
0028-0836
Nature
Springer Nature
1476-4687
K.
Hansen
doi
10.1038/353733a0
J.
Pedersen
Martin
T. P.
Atomic, Molecular, Nuclear, Particle and Plasma Physics
Borggreen
J.
Max-PLanck-lnstitut für Festkörperforschung, Heisenbergstrasse 1, D-700080, Stuttgart, Germany
Max-PLanck-lnstitut für Festkörperforschung, Heisenbergstrasse 1, D-700080, Stuttgart, Germany
6346
Springer Nature - SN SciGraph project