Related Experiment Video
Updated: May 24, 2025

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
Published on: December 3, 2013
A resonant photoemission study of La 4f-states in the LaMn2Si2 intermetallic compound
E A Ponomareva1, D I Radzivonchik1, V I Grebennikov1
1M. N. Mikheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 620108, Ekaterinburg, Russia. kat9107@yandex.ru.
Abstract:
The electronic structure of the ternary LaMn2Si2 intermetallic compound is investigated by means of valence band resonant photoemission spectroscopy at the La 4d-4f, 3d-4f, 3p-5d and Mn 2p-3d thresholds. To investigate the La 4f-states we tuned the photon energy towards the 3d-4f, 4d-4f absorption thresholds, which leads to the resonant enhancement of the photoemission intensity from the 4f-shell. The electronic structure calculations within density functional theory are found to be in good agreement with the experimental spectra and similarly demonstrate the presence of La 4f- and Mn 3d-states in these compounds.
Related Concept Videos
Photoluminescence: Fluorescence and Phosphorescence
A pair of electrons in a...
Atomic Spectroscopy: Absorption, Emission, and Fluorescence
Photoluminescence: Applications
Atomic Nuclei: Magnetic Resonance
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
Molecular Spectroscopy: Absorption and Emission

