Local magnetization in thes-d model

摘要: A calculation of the local magnetization in thes-d model is made up to terms second order «J ». It shown that, assuming a constant density states symmetric about Fermi level, one obtains singular contribution limit small magnetic fields whose value is\(\left\langle {S^z } \right\rangle _{\sin g} \sim J^2 \left\langle {(S^2 )^2 _{H = 0} [4\beta \Delta \omega _0 \ln \beta D + 2\beta D]\), whereD half-width and Δω0 proportional difference «g » factors. The evaluation all integrals leading above result discussed detail.