Non-quasiparticle states in Co$_2$MnSi evidenced through magnetic tunnel junction spectroscopy measurements

Details Non-quasiparticle states in Co$_2$MnSi evidenced through magnetic tunnel junction spectroscopy measurements Non-quasiparticle states in Co$_2$MnSi evidenced through magnetic tunnel junction spectroscopy measurements

2007-11-15

arxiv.org/abs/0711.2476v2

Physics

Condensed Matter

Strongly Correlated Electrons

Repalced Fig. 1. of PRL, 100, 086402 (2008), better k-space resolution for DOS around Fermi energy

Scientific paper

10.1103/PhysRevLett.100.086402

We investigate the effects of electronic correlations in the full-Heusler Co$_2$MnSi, by combining a theoretical analysis of the spin-resolved density of states with tunneling-conductance spectroscopy measurements using Co$_2$MnSi as electrode. Both experimental and theoretical results confirm the existence of so-called non-quasiparticle states and their crucial contribution to the finite-temperature spin polarisation in this material.

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