Strong renormalization of phonon frequencies in Mg(1-x)Al(x)B2.
The phonon spectrum of Mg(1-x)Al(x)B2 shows a strong dependence on the aluminum content x. This is experimentally demonstrated by both Raman and inelastic neutron scattering and theoretically predicted by first-principles calculations. The observed changes in the phonon spectrum are put into perspective with respect to the superconducting properties within this family of materials.
Renker
B
B
Forschungszentrum Karlsruhe, IFP, P.O.B. 3640, D-76021 Karlsruhe, Germany.
Bohnen
K B
KB
Heid
R
R
Ernst
D
D
Schober
H
H
Koza
M
M
Adelmann
P
P
Schweiss
P
P
Wolf
T
T