Non-quasiparticle states in Co$_2$MnSi evidenced through magnetic tunnel junction spectroscopy measurements
arXiv:0711.2476 · doi:10.1103/PhysRevLett.100.086402
Abstract
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.
Repalced Fig. 1. of PRL, 100, 086402 (2008), better k-space resolution for DOS around Fermi energy