- #1
matt_crouch
- 161
- 1
Homework Statement
Calculate the spin wave dispersion relation Ek for the ferromagnetic Heisenberg model with jtot = 1/2
Assume a 1d square lattice and interactions of strength J between nearest neighbours and zero elsewhere
Homework Equations
H|k> = [E0 +2jtot[itex]\sum J(r)(1-Exp(ik.r) [/itex]] |k>
The Attempt at a Solution
Not really sure where to start :/