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Details van artikel 7 van 14 gevonden artikelen
| Titel: |
Electron-vibration effects in Cs2SiF6 : Mn4 |
| Auteur: |
Hasan, Zameer Manson, Neil B. |
| Verschenen in: |
Molecular physics |
| Paginering: | Jaargang 40 (1980) nr. 5 pagina's 1227-1248 |
| Jaar: |
1980-08-10 |
| Inhoud: |
We report a study of the 4A2g →2T1g absorption band of Mn4+ in Cs2SiF6. The band shows several lines or groups of lines associated with transitions from the 4A2g ground state to the spin-orbit components (2T1g)Γ8 and (2T1g)Γ6 coupled to the three odd-parity vibrations v6(t2u), v4(t1u) and v3(t1u). The absorptions associated with the (2T1g)Γ8 electronic state have structure whereas those associated with the (2T1g)Γ6 do not. It is shown that the structure is a consequence of splitting of the Γ8 × v vibronic multiplets by electron-vibration interaction. The intensity of the 4A2g →(2T1g)Γi + vj vibronic transitions are expressed in terms of a small number of parameters; two parameters for v(t1u) modes and three for v(t2u) modes. Plausible but not good fits to the low temperature Zeeman data and vibronic splitting patterns are obtained. The excitation spectrum of the Cs2SiF6 : Mn4+ in the region of the 4A2g →2Eg and 4A2g →2T1g is recorded using a c.w. dye laser. This reveals numerous weaker lines involving combinational modes and even-parity modes v5(t2g), v2(eg) and v1(a1g). Several interesting electron-vibrational effects are observed. These are illustrated and discussed qualitatively. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 7 van 14 gevonden artikelen
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