Nonquasiparticle states in half-metallic ferromagnet NiMnSb

Abstract

Nonquasiparticle states above the Fermi energy are studied by first-principle dynamical mean field calculations for a prototype half-metallic ferromagnet, NiMnSb. We present a quantitative evaluation of the spectral weight of this characteristic feature and discuss the possible experimental investigation (BIS, NMR, STM and Andreev reflection) to clarify the existence of these states.

15 pages, 4 figures, acepted in PRB

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• Thermodynamics of the Heusler alloy Co_2-xMn_1+xSi: a combined density functional theory and cluster expansion study
• Electron Correlations and the Minority-Spin Band Gap in Half-Metallic Heusler Alloys
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• Half-metallic Ferromagnets, Spin Gapless Semiconductors, and Topological Semimetals Based on Heusler Alloys
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• Correlated electronic structure with uncorrelated disorder
• Absence of halfmetallicity in defect-free Cr, Mn-delta-doped Digital Magnetic Heterostructures
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• Scanning tunneling microscopy of surfaces of half-metals: an ab-initio study on NiMnSb(001)
• Effects of Strong Interactions in a Half Metallic Magnet: a Determinant Quantum Monte Carlo Study
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• Spectral properties of heterostructures containing half-metallic ferromagnets in the presence of local many-body correlations
• Nonquasiparticle states in half-metallic ferromagnets