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arXiv · 2603.22038

The Nonintrinsic Sector of Landau Theory

Trey Li
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Abstract

Landau theory usually treats free-energy coefficients as intrinsic parameters fixed by thermodynamic variables. We show that externally written microscale fields can survive coarse graining and enter the free-energy functional as spatially prescribed coefficient fields. This defines a nonintrinsic sector of Landau theory. The key condition is a hierarchy of correlation, writing, and frustration lengths. We identify ion-patterned FeRh as a plausible realization.

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Trey Li. 2026-03-23. The Nonintrinsic Sector of Landau Theory. https://arxiv.org/abs/2603.22038

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