Semiconductor - Ferromagnetic Insulator - Superconductor Nanowires: Stray Field and Exchange Field
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2019
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| _version_ | 1866929661036986368 |
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| author | Liu, Yu Vaitiekenas, Saulius Marti-Sanchez, Sara Koch, Christian Hart, Sean Cui, Zheng Kanne, Thomas Khan, Sabbir A. Tanta, Rawa Upadhyay, Shivendra Cachaza, Martin Espineira Marcus, Charles M. Arbiol, Jordi Moler, Kathryn A. Krogstrup, Peter |
| author_facet | Liu, Yu Vaitiekenas, Saulius Marti-Sanchez, Sara Koch, Christian Hart, Sean Cui, Zheng Kanne, Thomas Khan, Sabbir A. Tanta, Rawa Upadhyay, Shivendra Cachaza, Martin Espineira Marcus, Charles M. Arbiol, Jordi Moler, Kathryn A. Krogstrup, Peter |
| contents | Nanowires can serve as flexible substrates for hybrid epitaxial growth on selected facets, allowing for design of heterostructures with complex material combinations and geometries. In this work we report on hybrid epitaxy of semiconductor - ferromagnetic insulator - superconductor (InAs/EuS/Al) nanowire heterostructures. We study the crystal growth and complex epitaxial matching of wurtzite InAs / rock-salt EuS interfaces as well as rock-salt EuS / face-centered cubic Al interfaces. Because of the magnetic anisotropy originating from the nanowire shape, the magnetic structure of the EuS phase are easily tuned into single magnetic domains. This effect efficiently ejects the stray field lines along the nanowires. With tunnel spectroscopy measurements of the density of states, we show the material has a hard induced superconducting gap, and magnetic hysteretic evolution which indicates that the magnetic exchange fields are not negligible. These hybrid nanowires fulfil key material requirements for serving as a platform for spin-based quantum applications, such as scalable topological quantum computing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_1910_03364 |
| institution | arXiv |
| publishDate | 2019 |
| record_format | arxiv |
| spellingShingle | Semiconductor - Ferromagnetic Insulator - Superconductor Nanowires: Stray Field and Exchange Field Liu, Yu Vaitiekenas, Saulius Marti-Sanchez, Sara Koch, Christian Hart, Sean Cui, Zheng Kanne, Thomas Khan, Sabbir A. Tanta, Rawa Upadhyay, Shivendra Cachaza, Martin Espineira Marcus, Charles M. Arbiol, Jordi Moler, Kathryn A. Krogstrup, Peter Quantum Physics Mesoscale and Nanoscale Physics Materials Science Nanowires can serve as flexible substrates for hybrid epitaxial growth on selected facets, allowing for design of heterostructures with complex material combinations and geometries. In this work we report on hybrid epitaxy of semiconductor - ferromagnetic insulator - superconductor (InAs/EuS/Al) nanowire heterostructures. We study the crystal growth and complex epitaxial matching of wurtzite InAs / rock-salt EuS interfaces as well as rock-salt EuS / face-centered cubic Al interfaces. Because of the magnetic anisotropy originating from the nanowire shape, the magnetic structure of the EuS phase are easily tuned into single magnetic domains. This effect efficiently ejects the stray field lines along the nanowires. With tunnel spectroscopy measurements of the density of states, we show the material has a hard induced superconducting gap, and magnetic hysteretic evolution which indicates that the magnetic exchange fields are not negligible. These hybrid nanowires fulfil key material requirements for serving as a platform for spin-based quantum applications, such as scalable topological quantum computing. |
| title | Semiconductor - Ferromagnetic Insulator - Superconductor Nanowires: Stray Field and Exchange Field |
| topic | Quantum Physics Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/1910.03364 |