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- W2037307908 abstract "In the impurity system V2+:MgO, a d3 ion replaces a Mg2+ ion at an octahedral site. The resulting Zeeman spectra have been a puzzle for many years even with techniques employing high magnetic fields and low temperatures. In this paper, the system is treated as a Jahn-Teller 4T2g*( epsilon 1+ epsilon 2) system. In this treatment the triply degenerate electronic state designated by the group theoretical irreducible representation T couples to a spin state of J=3/2 to form spin-orbit states which couple through the electron-phonon interaction to doubly degenerate distortions of the lattice denoted epsilon which break the electronic degeneracy. While the electronic states can couple to the entire phonon spectrum of epsilon -distortions, the cluster approximation is usually employed which approximates by coupling to one suitably chosen frequency mode. In 4T2g*( epsilon 1+ epsilon 2) coupling is taken to two different modes epsilon 1 and epsilon 2 whose frequencies and coupling strengths are varied to probe the phonon density of states. This multimode treatment is found to yield better agreement with experimental results due to the sensitivity of the intensity quenching to a weakly coupled low-frequency mode." @default.
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- W2037307908 date "1984-12-30" @default.
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- W2037307908 title "A two-mode treatment of the4T2g×ϵJahn-Teller system V2+:MgO" @default.
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- W2037307908 doi "https://doi.org/10.1088/0022-3719/17/36/025" @default.
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