Polaronic Heat Capacity in The Anderson - Hasegawa Model
Manidipa Mitra, P. A. Sreeram, Sushanta Dattagupta
TL;DR
This paper provides an exact analysis of the Anderson-Hasegawa model including superexchange and polarons to understand heat capacity, highlighting the lattice's dominant role especially in ferromagnetic regimes, aligning with experimental data.
Contribution
It offers a novel exact solution for the two-site Anderson-Hasegawa model with polarons and superexchange, elucidating heat capacity contributions in magnetic materials.
Findings
Lattice contribution dominates heat capacity in ferromagnetic regime.
Results qualitatively agree with experimental observations.
Polarons significantly influence heat capacity behavior.
Abstract
An exact treatment of the Anderson - Hasegawa two - site model, incorporating the presence of superexchange and polarons, is used to compute the heat capacity. The calculated results point to the dominance of the lattice contribution, especially in the ferromagnetic regime. This behavior is in qualitative agreement with experimental findings.
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