Collective effects in photoionization of sodium clusters: plasmon resonance spill, induced attractive force and correlation minimum

Autor:	Shaik, Rasheed, Varma, Hari R., Chakraborty, Himadri S.
Rok vydání:	2020
Předmět:	Physics - Atomic and Molecular Clusters
Druh dokumentu:	Working Paper
DOI:	10.1088/1361-6455/ac03c9
Popis:	Photoionization studies of Na20 and Na92 clusters are carried out in a framework of linear response density functional theory. Cross sections show substantial spillover of plasmon resonances to the near-threshold ionization energies which are in reasonable agreements with measurements. The analysis of the oscillator strength, consumed by the cross section, lends further insights. The many-body interaction induced self-consistent field from density fluctuations suggests the existence of an attractive force. This may cause time-delayed plasmonic photoemissions in ultrafast measurements. At the waning end of the plasmon structure, a strong minimum in the cross sections from a correlation-driven coherence effect is predicted which can possibly be observed by the photoelectron spectroscopy. Comment: 9 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2010.04973 Zobrazit plný text záznamu View this record from Arxiv