Anisotropic multiband many-body interactions in LuNi2B2C.
We present a comprehensive de Haas-van Alphen study on the nonmagnetic borocarbide superconductor LuNi2B2C. The analysis of the angular-dependent effective masses for different bands in combination with full-potential density functional calculations allowed us to determine the mass-enhancement factors, lambda, for the different electronic bands and their wave-vector dependences. Our data clearly show the anisotropic multiband character of the superconductivity in LuNi2B2C.
Bergk
B
B
Hochfeld-Magnetlabor Dresden (HLD), Forschungszentrum Dresden-Rossendorf, D-01314 Dresden, Germany.
Petzold
V
V
Rosner
H
H
Drechsler
S-L
SL
Bartkowiak
M
M
Ignatchik
O
O
Bianchi
A D
AD
Sheikin
I
I
Canfield
P C
PC
Wosnitza
J
J