تقرير
Spiral magnetic order and topological superconductivity in a chain of magnetic adatoms on a two-dimensional superconductor
| العنوان: | Spiral magnetic order and topological superconductivity in a chain of magnetic adatoms on a two-dimensional superconductor |
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| المؤلفون: | Christensen, M. H., Schecter, M., Flensberg, K., Andersen, B. M., Paaske, J. |
| المصدر: | Phys. Rev. B 94, 144509 (2016) |
| سنة النشر: | 2016 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | We study the magnetic and electronic phases of a 1D magnetic adatom chain on a 2D superconductor. In particular, we confirm the existence of a `self-organized' 1D topologically non-trivial superconducting phase within the set of subgap Yu-Shiba-Rusinov (YSR) states formed along the magnetic chain. This phase is stabilized by incommensurate spiral correlations within the magnetic chain that arise from the competition between short-range ferromagnetic and long-range antiferromagnetic electron-induced exchange interactions, similar to a recent study for a 3D superconductor [M. Schecter et al. Phys. Rev. B 93, 140503(R) 2016]. The exchange interaction along diagonal directions are also considered and found to display behavior similar to a 1D substrate when close to half filling. We show that the topological phase diagram is robust against local superconducting order parameter suppression and weak substrate spin-orbit coupling. Lastly, we study the effect of a direct ferromagnetic exchange coupling between the adatoms, and find the region of spiral order in the phase diagram to be significantly enlarged in a wide range of the direct exchange coupling. Comment: 12 pages, 13 figures, published version |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.94.144509 |
| URL الوصول: | http://arxiv.org/abs/1607.08190 |
| رقم الأكسشن: | edsarx.1607.08190 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.94.144509 |
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