$E\otimes e$ Jahn-Teller Effect in $C_{70}^{3-}$ Systems

摘要: The electron-phonon interaction in $C_{70}$ anions is studied by making use of a lattice relaxation approach. We find there exists Jahn-Teller effect $C_{70}^{3-}$ system, due to an extra electron being doped the double degenerate $E_{1}^{''}$ state. As result this effect, original $D_{5h}$ symmetry ground state becomes unstable, which causes distortion configuration. only maintained final $x-y$ plane reflection symmetry. further that besides active $A_{1}^{'}, A_{2}^{'}, E_{2}^{'}$ modes, non-Jahn-Teller $E_{1}^{'}$ vibrations also contribute process, come from nonlinear and are two or three orders smaller than those modes. suggest molecule promising Berry Phase candidate effective $E \otimes e$ system.