Cohen Macaulay modules and positroid varieties

Abstract: Jensen, King, and Su described a category $\operatorname{CM}(C)$ which categorifies the cluster structure on the homogeneous coordinate ring of a Grassmannian. In this paper we describe subcategories $$\operatorname{R}(v,w) \subseteq \operatorname{CM}(C)$$ which lift Leclerc's categories $\mathcal{C}_{v,w}$ in the case where $$v \in \left(W^{{k}\backslash} W\right)<sup>{\max}$$ and $w \geq v.$ As such, these categories are Frobenius, stably 2-CY, have natural cluster characters, and induce a cluster structure in lifts of open positroid varieties.