Spin-dependent tunneling between individual superconducting bound states
Fuente:
arXiv
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| Autores principales: | , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2020
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866913187878666240 |
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| author | Huang, Haonan Senkpiel, Jacob Padurariu, Ciprian Drost, Robert Villas, Alberto Klees, Raffael L. Yeyati, Alfredo Levy Cuevas, Juan Carlos Kubala, Björn Ankerhold, Joachim Kern, Klaus Ast, Christian R. |
| author_facet | Huang, Haonan Senkpiel, Jacob Padurariu, Ciprian Drost, Robert Villas, Alberto Klees, Raffael L. Yeyati, Alfredo Levy Cuevas, Juan Carlos Kubala, Björn Ankerhold, Joachim Kern, Klaus Ast, Christian R. |
| contents | Magnetic impurities on superconductors induce discrete bound levels inside the superconducting gap, known as Yu-Shiba-Rusinov (YSR) states. YSR levels are fully spin-polarized such that the tunneling between YSR states depends on their relative spin orientation. Here, we use scanning tunneling spectroscopy to resolve the spin dynamics in the tunneling process between two YSR states by experimentally extracting the angle between the spins. To this end, we exploit the ratio of thermally activated and direct spectral features in the measurement to directly extract the relative spin orientation between the two YSR states. We find freely rotating spins down to 7mK, indicating a purely paramagnetic nature of the impurities. Such a non-collinear spin alignment is essential not only for producing Majorana bound states but also as an outlook manipulating and moving the Majorana state onto the tip. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2012_09257 |
| institution | arXiv |
| publishDate | 2020 |
| record_format | arxiv |
| spellingShingle | Spin-dependent tunneling between individual superconducting bound states Huang, Haonan Senkpiel, Jacob Padurariu, Ciprian Drost, Robert Villas, Alberto Klees, Raffael L. Yeyati, Alfredo Levy Cuevas, Juan Carlos Kubala, Björn Ankerhold, Joachim Kern, Klaus Ast, Christian R. Superconductivity Magnetic impurities on superconductors induce discrete bound levels inside the superconducting gap, known as Yu-Shiba-Rusinov (YSR) states. YSR levels are fully spin-polarized such that the tunneling between YSR states depends on their relative spin orientation. Here, we use scanning tunneling spectroscopy to resolve the spin dynamics in the tunneling process between two YSR states by experimentally extracting the angle between the spins. To this end, we exploit the ratio of thermally activated and direct spectral features in the measurement to directly extract the relative spin orientation between the two YSR states. We find freely rotating spins down to 7mK, indicating a purely paramagnetic nature of the impurities. Such a non-collinear spin alignment is essential not only for producing Majorana bound states but also as an outlook manipulating and moving the Majorana state onto the tip. |
| title | Spin-dependent tunneling between individual superconducting bound states |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2012.09257 |