文摘
This paper is concerned with the following perturbed elliptic system: \(-\varepsilon^{2}\triangle u+V(x)u=W_{v}(x, u, v)\) , \(x\in{\mathbb {R}}^{N}\) , \(-\varepsilon^{2}\triangle v+V(x)v=W_{u}(x, u, v)\) , \(x\in{\mathbb {R}}^{N}\) , \(u, v\in H^{1}({\mathbb{R}}^{N})\) , where \(V \in C({\mathbb{R}}^{N}, {\mathbb{R}})\) and \(W \in C^{1}({\mathbb{R}}^{N}\times\mathbb{R}^{2}, {\mathbb{R}})\) . Under some mild conditions on the potential V and nonlinearity W, we establish the existence of nontrivial semi-classical solutions via variational methods, provided that \(0 , where the bound \(\varepsilon_{0}\) is formulated in terms of N, V, and W.