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Examines stability outcomes of a spherical approach in two-dimensional magnets, suggesting strategies to address instability.
One of the scenarios of high-temperature superconductivity is based on spin-polar pairing. The theory of the spin polaron is based on the properties of a 2D magnet. A common algorithm for investigating these properties is a spherically symmetric approach that preserves the constraints of exact theorems. The present paper provides a concise overview of some of the outcomes of the spherical approach with a focus on the stability of a self-consistent solution. The last section presents a model that does not allow for a stable solution, and discusses possible ways to overcome the problem.
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Mikheyenkov et al. (2025) studied this question.
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