Bento Ribeiro R C, Correa J H, Ricco L S, Shelykh I A, Continentino Mucio A, Seridonio A C, Minissale M, Le Lay G, Figueira M S
Centro Brasileiro de Pesquisas Físicas, Rua Dr. Xavier Sigaud, 150, Urca, Rio de Janeiro, RJ, 22290-180, Brazil.
Universidad Tecnológica del Perú, Nathalio Sánchez, 125, 15046, Lima, Peru.
Sci Rep. 2023 Oct 20;13(1):17965. doi: 10.1038/s41598-023-44739-7.
We theoretically propose penta-silicene nanoribbons (p-SiNRs) with induced p-wave superconductivity as a platform for the emergence of spin-polarized Majorana zero-modes (MZMs). The model explicitly considers the key ingredients of well-known Majorana hybrid nanowire setups: Rashba spin-orbit coupling, magnetic field perpendicular to the nanoribbon plane, and first nearest neighbor hopping with p-wave superconducting pairing. The energy spectrum of the system, as a function of chemical potential, reveals the existence of MZMs with a well-defined spin orientation localized at the opposite ends of both the top and bottom chains of the p-SiNR, associated with well-localized and nonoverlapping wave function profiles. Well-established experimental techniques enable the fabrication of highly ordered p-SiNRs, complemented by a thin lead film on top, responsible for inducing p-wave superconductivity through proximity effect. Moreover, the emergence of MZMs with explicit opposite spin orientations for some set of model parameters opens a new avenue for exploring quantum computing operations, which accounts for both MZMs and spin properties, as well as for new MZMs probe devices based on spin-polarized electronic transport mechanisms.
我们从理论上提出，具有诱导p波超导性的五硅烯纳米带（p-SiNRs）可作为自旋极化马约拉纳零模（MZMs）出现的平台。该模型明确考虑了著名的马约拉纳混合纳米线设置的关键要素：拉什巴自旋轨道耦合、垂直于纳米带平面的磁场以及具有p波超导配对的第一近邻跳跃。系统的能谱作为化学势的函数，揭示了在p-SiNR的顶部和底部链的相对两端存在具有明确自旋取向的MZMs，这与良好局域化且不重叠的波函数分布相关。成熟的实验技术能够制造高度有序的p-SiNRs，并在顶部辅以一层薄铅膜，该铅膜通过近邻效应诱导p波超导性。此外，对于某些模型参数集，具有明确相反自旋取向的MZMs的出现为探索量子计算操作开辟了一条新途径，这既涉及MZMs和自旋特性，也涉及基于自旋极化电子输运机制的新型MZMs探测设备。
