Unbiased access to exchange splitting of magnetic bands using the maximum entropy method

W. von der Linden, M. Donath, V. Dose

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The experimental information about magnetic bands and their temperature dependence is distorted by Fermi distribution and apparatus function. The recovery of the spectral density constitutes an ill-posed inversion problem. We have invoked the maximum entropy regularization to deconvolute spin-resolved inverse photoemission data of Ni(110). The effective energy resolution is hereby improved by a factor of 5 and structures below EF, which are generally lost in inverse photoemission, are recovered. The temperature-dependent data for Ni reveal clearly a pair of spin-split bands. The splitting vanishes on approaching the Curie temperature.
Original languageEnglish
Pages (from-to)899
Number of pages1
JournalPhysical Review Letters
Issue number6
Publication statusPublished - 1993


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