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Half-metallic ferromagnetism and spin polarization in CrO2

MPS-Authors
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Yamasaki,  A.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Daghofer,  M.
Department Quantum Many-Body Theory (Walter Metzner), Max Planck Institute for Solid State Research, Max Planck Society;

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Lichtenstein,  A. I.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Department Quantum Many-Body Theory (Walter Metzner), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Chioncel, L., Allmaier, H., Arrigoni, E., Yamasaki, A., Daghofer, M., Katsnelson, M. I., et al. (2007). Half-metallic ferromagnetism and spin polarization in CrO2. Physical Review B, 75(14): 140406R.


Cite as: https://hdl.handle.net/21.11116/0000-000E-B789-9
Abstract
We present electronic structure calculations in combination with local and nonlocal many-body correlation effects for the half-metallic ferromagnet CrO2. Both zero temperature results from a variational cluster approach as well as finite-temperature dynamical mean field theory results support the existence of low-energy nonquasiparticle states, which turn out to be essential for a correct quantitative description of depolarization effects.