TY  - JOUR
AU  - Brasse, M.
AU  - Chioncel, L.
AU  - Kuneš, J.
AU  - Bauer, A.
AU  - Regnat, A.
AU  - Blum, C. G. F.
AU  - Wurmehl, S.
AU  - Pfleiderer, C.
AU  - Wilde, M. A.
AU  - Grundler, D.
TI  - de Haas–van Alphen effect and Fermi surface properties of single-crystal CrB $_{2}$
JO  - Physical review / B
VL  - 88
IS  - 15
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2015-03016
SP  - 155138
PY  - 2013
AB  - We report the angular dependence of three distinct de Haas–van Alphen (dHvA) frequencies of the torque magnetization in the itinerant antiferromagnet CrB2 at temperatures down to 0.3 K and magnetic fields up to 14 T. Comparison with the Fermi surface calculations considering an incommensurate cycloidal magnetic order suggests that two of the observed dHvA oscillations arise from electronlike Fermi surface sheets formed by bands with strong B-px,y character. The third orbit could correspond to a Cr-d derived Fermi surface sheet. The measured effective masses of these Fermi surface sheets display strong enhancements of a factor of about 2 over the calculated band masses which can be attributed to electron-phonon coupling and electronic correlations. Signatures of further heavy d-electron bands that are predicted by the calculations are not observed in the temperature and field range studied. In the view that the B-p bands are at the heart of conventional high-temperature superconductivity in the isostructural MgB2, we consider possible implications of our findings for nonmagnetic CrB2 and an interplay of itinerant antiferromagnetism with superconductivity.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000326389800001
DO  - DOI:10.1103/PhysRevB.88.155138
UR  - https://juser.fz-juelich.de/record/190057
ER  -