Evidence for an instability near twice the fermi wave vector in the low electronic density liquid metal Li(NH3)4.
We report high-resolution inelastic x-ray scattering measurements in the metallic liquid Li(NH3)4, which to a good approximation can be treated as a dilute alkali metal. We see a well-defined excitation out to large momentum transfers. This excitation shows a strong softening at wave vectors near the first peak in the structure factor, which occurs near twice the Fermi momentum.
Burns
C A
CA
Department of Physics, Western Michigan University, Kalamazoo 49008, USA.
Platzman
P M
PM
Sinn
H
H
Alatas
A
A
Alp
E E
EE