Figure 5

Profile of screened potential energy along channel \(y=0\) showing the entrance \(U_{\text{ent}}\) and exit \(U_{\text{ext}} \) barrier heights for a) FF operating in the CPR and b) FS operating in the LPR. Each is linear in the applied voltages \(V_{\text{ent}}\) and \(U_{\text{ext}}\) respectively. Here \(V_{\text{ent}}\) is −1 V and \(V_{\text{ext}}\) is −3 V in both plots