Electronic structure of MnSi: The role of electron-electron interactions

F. Carbone, M. Zangrando, A. Brinkman, A. Nicolaou, F. Bondino, E. Magnano, A. A. Nugroho, F. Parmigiani, Th. Jarlborg, and D. van der Marel
Phys. Rev. B 73, 085114 – Published 21 February 2006

Abstract

We present an experimental study of the electronic structure of MnSi. Using x-ray absorption spectroscopy (XAS), x-ray photoemission, and x-ray fluorescence, we provide experimental evidence that MnSi has a mixed valence ground state. We show that self-consistent local density approximation supercell calculations cannot replicate the XAS spectra of MnSi, while a good match is achieved within the atomic multiplet theory assuming a mixed valence ground state. We discuss the role of the electron-electron interactions in this compound and estimate that the valence fluctuations are suppressed by a factor of 2.5, which means that the Coulomb repulsion is not negligible.

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  • Received 9 September 2005

DOI:https://doi.org/10.1103/PhysRevB.73.085114

©2006 American Physical Society

Authors & Affiliations

F. Carbone1, M. Zangrando2, A. Brinkman1, A. Nicolaou2, F. Bondino2, E. Magnano2, A. A. Nugroho4,5, F. Parmigiani2,3, Th. Jarlborg1, and D. van der Marel1

  • 1Département de Physique de la Matière Condensée, Universitée de Genève, CH-1211 Genève 4, Switzerland
  • 2Laboratorio Nazionale TASC-CNR, Basovizza Strada Statale 14, Km 163.5, 34012 Trieste, Italy
  • 3INFM, Dipartimento di Matematica e Fisica, UCSC, Via dei Musei 41, 25121 Brescia, Italy
  • 4Materials Science Centre, University of Groningen, 9747 AG Groningen, The Netherlands
  • 5Jurusan Fisika, Institut Teknologi Bandung, Indonesia

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Issue

Vol. 73, Iss. 8 — 15 February 2006

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