Cubic perturbed centrifugally stabilized excited state in orthorhombic manganites

A model Hamiltonian for centrifugally stabilized electronic-vibrational motion of a cubic perturbed upper “Mexican hat” potential surface for a Mn3+ ion in an octahedral symmetry is formulated, and its eigenspectrum is explored. Theoretically calculated eigenvalues for cubic perturbed ground and exc...

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Published inThe Journal of chemical physics Vol. 150; no. 6; pp. 064703 - 64716
Main Authors Dutta, Joy, Adhikari, Satrajit, Kovaleva, N. N.
Format Journal Article
LanguageEnglish
Published United States American Institute of Physics 14.02.2019
Subjects
Eigenvalues
Electron states
Lanthanum compounds
Manganese ions
Physics
Temperature dependence
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Summary:A model Hamiltonian for centrifugally stabilized electronic-vibrational motion of a cubic perturbed upper “Mexican hat” potential surface for a Mn3+ ion in an octahedral symmetry is formulated, and its eigenspectrum is explored. Theoretically calculated eigenvalues for cubic perturbed ground and excited electronic states are employed to interpret the origin of higher energy narrow side bands (satellite transitions) appearing in the dielectric function spectra of the LaMnO3 complex, which exhibit anomalous temperature dependence in the vicinity of the Néel temperature, TN ≃ 140 K [N. N. Kovaleva et al., J. Exp. Theor. Phys. 122, 890 (2016)].
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ISSN:0021-9606
1089-7690
1089-7690
DOI:10.1063/1.5082008