What question did this study set out to answer?

To determine how spherically symmetric ionic charge relaxation driven by long-range electrostatic potentials affects lattice vibrations and elastic behavior beyond the rigid-ion model.

April 29, 1985Physical Review Letters

Beyond the Rigid-Ion Approximation with Spherically Symmetric Ions

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To determine how spherically symmetric ionic charge relaxation driven by long-range electrostatic potentials affects lattice vibrations and elastic behavior beyond the rigid-ion model.
Conducted ab initio quantum mechanical calculations to evaluate electronic charge distribution responses in crystal lattices.
Modeled ion-lattice interactions under the influence of long-range electrostatic potentials.
Spherically symmetric charge relaxation accounts for the frequency splitting between longitudinal-optic and transverse-optic phonon modes.
Dynamic charge relaxation explains the observed violation of the Cauchy relations among crystalline elastic constants.

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Implication

Ab initio calculations demonstrate spherically symmetric charge relaxation in ionic crystals, highlighting mechanisms behind optic-mode frequency splitting and Cauchy relation violations.

Cite This Study

Boyer et al. (1985) studied this question.

synapsesocial.com/papers/6a0ff6202badbc352aff0d10 https://doi.org/10.1103/physrevlett.54.1940

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Implication

Ab initio calculations demonstrate spherically symmetric charge relaxation in ionic crystals, highlighting mechanisms behind optic-mode frequency splitting and Cauchy relation violations.

Beyond the Rigid-Ion Approximation with Spherically Symmetric Ions

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Discussion

Implication

Cite This Study

Beyond the Rigid-Ion Approximation with Spherically Symmetric Ions

Key Points

Discussion

Implication

Cite This Study

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