Soft X-ray fluorescence study of the quasi-one dimensional Heisenberg antiferromagnet tetraphenylverdazyl

概要

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Soft-x-ray fluorescence measurements have been performed on a single crystal of the organic antiferromagnet2,4,6-triphenylverdazyl. Resonant and nonresonant C Ka and N Ka (2p!1s transition! x-ray emissionspectra ~XES! were measured and compared with x-ray photoelectron valence band spectra and deMondensity-functional theory calculations. It is shown that intramolecular interactions are much stronger thanintermolecular ones and give the main contribution to the formation of C 2p density of states. We presentevidence of a delocalization of unpaired N 2p electrons over the verdazyl ring. The excitation energy dependenceof C Ka and N Ka XES observed below the C 1s and N 1s thresholds, respectively, is discussed interms of symmetry selective resonant inelastic x-ray scattering.
The American Physical Societyの論文
2000-12-15