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electric field gradient 1hyperfine spectroscopy 1landau theory 1phase transitions 1symmetry analysis 1

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cond-mat.str-el2026

The electric field gradient tensor as a symmetry-adapted order parameter in Landau theory

L. Scalise, A. W. Carbonari

The paper introduces a systematic Landau‑theory framework that treats the electric field gradient (EFG) tensor as a symmetry‑adapted order parameter, showing how its components cou…