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- W2128930069 abstract "A previous optical work on the 4T2(D) state of Rb2MnCl4 is extended to all other states in the visible-near UV region and completed by magnetic circular dichroism (MCD) measurements. Magnetic dipole origins are located for the 4E(G), 4T2(D), and 4T1(P) states. Magnon sidebands are observed at 80 cm−1 for all states but 4T2(G), in good agreement with the known zone-edge magnon frequency. Exciton-magnon interaction is found to be negligible. The dominant orbital character of each exciton is characterized by means of either the associated MCD or the polarization of magnon sidebands. The effects of the tetragonal distortion and spin-orbit coupling on the various orbital triplets is discussed. Un travail spectroscopique précédent sur l'état 4T2(D) de Rb2MnCl4 est étendu ici à tous les autres termes spectraux du domaine visible-proche UV. Nos mesures d'absorption polarisée et de dichroisme circulaire magnétique (DCM) nous ont permis de localiser et de caractériser plusieurs raies origines à caractère dipolaire magnétique. Le DCM et la polarisation des raies magnons sont utilisés pour déterminer le rǒle respectif du champ tétragonal et du couplage spin-orbite sur les triplets orbitaux. L'énergie des magnons en bord de zone est établie à 80 cm−1 et l'interaction exciton-magnon est négligeable." @default.
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- W2128930069 date "1984-07-01" @default.
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- W2128930069 title "Optical and Magnetic Circular Dichroism Study of the 2D Antiferromagnet Rb2MnCl4" @default.
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- W2128930069 doi "https://doi.org/10.1002/pssb.2221240110" @default.
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