Electronic Goos-H\"anchen shift through double barriers in phosphorene

We consider fermions in phosphorene through double barriers and study the corresponding Goos-H\"anchen (GH) shift. To accomplish this, we initially compute the corresponding transmission amplitude by applying boundary conditions. From the resulting transmission phase, we extract the GH shift. Our findings reveal that the GH shift's magnitude is contingent upon the energy of the incident electron and the barrier parameters. Additionally, we observe that the GH shift changes sign at the transmission boundaries-specifically, at the transmission resonances occurring immediately before and after the gap region, where transmission is zero.