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首页> 外文期刊>Science Advances >Toward tailoring Majorana bound states in artificially constructed magnetic atom chains on elemental superconductors
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Toward tailoring Majorana bound states in artificially constructed magnetic atom chains on elemental superconductors

机译：在元素超导体上人工构造的磁原子链中实现马约拉纳结合态的剪裁

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Realizing Majorana bound states (MBS) in condensed matter systems is a key challenge on the way toward topological quantum computing. As a promising platform, one-dimensional magnetic chains on conventional superconductors were theoretically predicted to host MBS at the chain ends. We demonstrate a novel approach to design of model-type atomic-scale systems for studying MBS using single-atom manipulation techniques. Our artificially constructed atomic Fe chains on a Re surface exhibit spin spiral states and a remarkable enhancement of the local density of states at zero energy being strongly localized at the chain ends. Moreover, the zero-energy modes at the chain ends are shown to emerge and become stabilized with increasing chain length. Tight-binding model calculations based on parameters obtained from ab initio calculations corroborate that the system resides in the topological phase. Our work opens new pathways to design MBS in atomic-scale hybrid structures as a basis for fault-tolerant topological quantum computing.
机译：在凝聚态系统中实现Majorana束缚态（MBS）是走向拓扑量子计算的主要挑战。作为有前途的平台，理论上预测常规超导体上的一维磁链将在链端托管MBS。我们演示了一种新颖的方法，用于设计模型类型的原子级系统，用于使用单原子操作技术研究MBS。我们在Re表面上人工构造的原子Fe链表现出自旋螺旋态，零能量处的局部态密度显着增强，强烈地位于链端。此外，随着链长的增加，链端的零能量模式显示出来并变得稳定。基于从头算获得的参数的紧密绑定模型计算，证实了该系统处于拓扑阶段。我们的工作为设计原子级混合结构中的MBS开辟了新途径，将其作为容错拓扑量子计算的基础。

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