In:
Surface Review and Letters, World Scientific Pub Co Pte Ltd, Vol. 03, No. 01 ( 1996-02), p. 717-720
Abstract:
Cationic Na clusters are formed in the α and β cages of Na-form LTA by incorporating Na atoms from vapor. The maximum number of Na atoms incorporated is 4.9 per unit cell. Ac magnetic susceptibilities and optical reflection spectra are measured as a function of Na loading density. Na clusters show diamagnetism independent of Na loading density while K clusters in K-LTA and Rb clusters in Rb-LTA show ferromagnetism at certain loading densities. All Na clusters contain therefore an even number of the electrons, which are supplied from 3s-electrons of the guest Na atoms, irrespective of the cages they are formed. The electron-phonon interaction plays an important role in stabilizing the singlet state. In the reflection spectra of highly loaded sample, a strong band is observed at 1.95 eV. An oscillator strength of this band exceeds unity per cluster by a great deal. This band is assigned to surface-plasmon-like excitation of Na cluster formed in α cage.
Type of Medium:
Online Resource
ISSN:
0218-625X
,
1793-6667
DOI:
10.1142/S0218625X96001297
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
1996
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