Stoner gap

The collective excitation spectrum of strong itinerant ferromagnets is dominated by the Stoner gap Ab given by eq. (50) rather than the transverse spin fluctuations. As mentioned above the poles of ) are undamped spin... 

Liu S, Tafet S, Stoner L, Delmar M, Vallano ML, Jalife J A structural basis for the unequal sensitivity of the major cardiac and liver gap junctions to intracellular acidification The carboxy tail length. Biophys J 1993 64 1422-1433. 

Fig. 44. Transitions across hybridization gaps of the quasiparticle band structure (a) can, depending on the position of the chemical potential (assumed inside the pseudogap for this calculation), and on the other band-structure features, give rise to pronounced structures in the non-local interaction part Y = x K of the Stoner denominator [compare eqs. (19) and (20)] at small wavevectors (b). In (b) a = y/ir with y defined in eq. (20) is varied somewhat around its proper value of (Grewe and Welslau 1988) to exhibit the strong tendency towards a magnetic instability occurring for Y(9 it> i/ = 0) = l.

---