Nonquasiparticle states in Co2MnSi evidenced through magnetic tunnel junction spectroscopy measurements.
We investigate the effects of electronic correlations in the full-Heusler Co2MnSi, by combining a theoretical analysis of the spin-resolved density of states with tunneling-conductance spectroscopy measurements using Co2MnSi as electrode. Both experimental and theoretical results confirm the existence of so-called nonquasiparticle states and their crucial contribution to the finite-temperature spin polarization in this material.
Chioncel
L
L
Institute of Theoretical Physics, Graz University of Technology, A-8010 Graz, Austria.
Sakuraba
Y
Y
Arrigoni
E
E
Katsnelson
M I
MI
Oogane
M
M
Ando
Y
Y
Miyazaki
T
T
Burzo
E
E
Lichtenstein
A I
AI