... (1967) Sturge, "Jahn-Teller effect in solids," Solid state O'Brien and C C Chancey, "The effect: An introduction and current re­ (1993), view," Amer J, Physics 61, ... operator, connecting the ground state with the excited state s of energy  = Es - Eo above the ground state Then by standard perturbation theory the wavefunction of the ground state in a weak field (J.LzB... in applyi ng the rules Triplet excited states Some organic molecules have a triplet (S = 1) excited state at an energy kBil above a singlet (S = 0) ground state (a) Find an expression for the magnetic