Effects of Lattice Vibrations on the Optical Spectra of Ions in Crystals |
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23 space antisymmetric Appendix apply approximately assume broadening calculation configuration corresponds crystal field theory crystalline field cubic field define dx dy electric dipole transitions electronic emission energy level diagram energy levels Enhancetron equation equilibrium experimental frequency Gaussian ground Hamiltonian harmonic oscillator heat heat equation helium involved Jahn-Teller effect LaF3 lattice linear combination linewidth lock-in amplifier look Lorentzian manganin manifold matrix elements measurements mode no-phonon line octahedral octahedral field odd vibrations optical orbital perturbation phonon phonon field photomultiplier plotted polarization quantized Raman sample scans second order shown in Fig signal solutions spectra spectrum spin spin-orbit coupling spin-orbit interaction spin-orbit splitting square wave symmetry temperature modulation tetragonal tetragonal distortion theoretical thermal tion traces transforms transition probability trigonal field vibronic interactions wave functions widths λρ μω