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

W. von der Linden, M. Donath, and V. Dose
Phys. Rev. Lett. 71, 899 – Published 9 August 1993
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Abstract

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.

  • Received 17 February 1993

DOI:https://doi.org/10.1103/PhysRevLett.71.899

©1993 American Physical Society

Authors & Affiliations

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

  • Max-Planck-Institut für Plasmaphysik, EURATOM Association, D-85740 Garching B. München, Germany

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Vol. 71, Iss. 6 — 9 August 1993

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