Interplay between Classical Magnetic Moments and Superconductivity in Quantum One-Dimensional Conductors: Toward a Self-Sustained Topological Majorana Phase
Interplay between Classical Magnetic Moments and Superconductivity in Quantum One-Dimensional Conductors: Toward a Self-Sustained Topological Majorana Phase
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DOI：
10.1103/physrevlett.111.147202
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发表时间：
2013-10-01
影响因子：
8.6
通讯作者：
Simon, Pascal
中科院分区：
文献类型：
--
作者：
Braunecker, Bernd;Simon, Pascal
我们研究了一维相互作用的电子液体耦合到一维阵列的经典磁矩和超导体。我们表明，在低能量和温度的磁矩和电子变得强烈纠缠，并出现磁螺旋结构。为了使电子和磁矩之间的耦合足够强，一维电子液体被驱动到支持马约拉纳费米子的拓扑超导相，而无需任何外部参数的微调。我们的分析适用于在足够低的温度下，当考虑到电子和核自旋之间的超精细相互作用时，在超导体附近的量子线，或吸附在超导表面上的磁性吸附原子链。
We study a one-dimensional interacting electronic liquid coupled to a 1D array of classical magnetic moments and to a superconductor. We show that at low energy and temperature the magnetic moments and the electrons become strongly entangled and that a magnetic spiral structure emerges. For strong enough coupling between the electrons and magnetic moments, the 1D electronic liquid is driven into a topological superconducting phase supporting Majorana fermions without any fine-tuning of external parameters. Our analysis applies at low enough temperature to a quantum wire in proximity to a superconductor when the hyperfine interaction between electrons and nuclear spins is taken into account, or to a chain of magnetic adatoms adsorbed on a superconducting surface.