在拓扑量子计算的背景下, 涡旋芯中的马约拉纳零模引起了广泛关注。然而，零能束缚态 可能偶然出现，并不一定是马约拉纳零模。在实验中必须仔细排除这类偶然零模，以识别真正的 马约拉纳零模。我们的研究表明，在自旋轨道耦合的多带超导体（如铁硒基超导体）中，如果配 对对称性是无节点 d 波（在无自旋轨道耦合的情况下定义），那么涡旋芯中确实会出现偶然零模。 反之，如果配对对称性相对于自旋轨道耦合分裂的费米口袋是 s₊₊ 或 s_±，那么在弱自旋轨道耦 合极限下，偶然零模不会出现。我们的结果不仅对马约拉纳零模的实验识别至关重要，也为确定 铁硒基超导体的配对对称性提供了一条途径。

The Majorana zero modes in vortex cores are of extensive interest in the context of topological quantum computing. However, a zero-energy bound state may arise accidentally but is not necessarily a Majorana zero mode. Such accidental zero modes should be carefully ruled out in experiment in order to identify the genuine Majorana zero modes. We show that in a spin-orbital coupled multi-band superconductor, such as the iron-selenide superconductor, accidental zero modes indeed arise in the vortex core if the pairing symmetry is the so-called nodeless d-wave (defined in the absence of spin-orbital coupling). Instead, if the pairing symmetry is s₊₊ or s± with respect to the Fermi pockets split by the spin-orbital coupling, the accidental zero modes do not appear in the limit of weak spin-orbital coupling. Our results are not only important in the experimental identification of Majorana zero modes, but also provide an avenue to pinpoint the pairing symmetry of the iron-selenide superconductor.