Physics20755 marksBloch theorem
Explain Bloch theorem. Discuss its use in Kronig-Penney model and hence in band theory.
Explain Bloch theorem. Discuss its use in Kronig-Penney model and hence in band theory. [5]
--- In a crystalline solid, atoms are arranged in a periodic lattice. If the spacing between ions in the x-direction is 'd', then the potential energy of an electron at position x is equal to the potential energy at position x + d: $$V(x) = V(x + d)$$ This is called a periodic potential. Statemen...