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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2402.16022 |
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| _version_ | 1866917597433298944 |
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| author | Hua, Xiangyu Zeng, Zimeng Meng, Fanbao Yao, Hongxu Huang, Zongyao Long, Xuanyu Li, Zhaohang Wang, Youfang Wang, Zhenyu Wu, Tao Weng, Zhengyu Wang, Yihua Liu, Zheng Xiang, Ziji Chen, Xianhui |
| author_facet | Hua, Xiangyu Zeng, Zimeng Meng, Fanbao Yao, Hongxu Huang, Zongyao Long, Xuanyu Li, Zhaohang Wang, Youfang Wang, Zhenyu Wu, Tao Weng, Zhengyu Wang, Yihua Liu, Zheng Xiang, Ziji Chen, Xianhui |
| contents | The intimate connection between magnetism and superconducting pairing routinely plays a central role in determining the occurrence of unconventional superconducting states. In high-transition-temperature (high-Tc) stripe-ordered cuprate superconductors and a magnetically ordered iron-based superconductor, the coupling between magnetism and superconductivity gives birth to novel phases of matter with modulation of the superconducting pairing in the real space. Further exploration of these phases can shed light on the mechanism of unconventional superconductivity. Here we report on the discovery of a peculiar spatially-varying superconducting state residing at the interface between (110)-oriented KTaO3 and ferromagnetic EuO. Electrical transport measurements reveal different Tc and upper critical fields (Hc2) with current applied along the two orthogonal in-plane directions. Such anisotropy persistently occurs in the low-carrier-density samples that are characterized by strong coupling between Ta 5d and Eu 4f electrons, whereas in the high-carrier-density samples the coupling is weakened and Tc and Hc2 becomes isotropic. Complemented by local imaging of diamagnetism and theoretical analysis, our observations imply an unprecedented emergence of superconducting stripes wherein the phase coherence is established ahead of the rest of the interface, arising from a band-filling-dependent ferromagnetic proximity. The realization of such exotic superconducting states provides impetus for the study of novel physics in heterostructures possessing both magnetism and superconductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_16022 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Superconducting stripes induced by ferromagnetic proximity in an oxide heterostructure Hua, Xiangyu Zeng, Zimeng Meng, Fanbao Yao, Hongxu Huang, Zongyao Long, Xuanyu Li, Zhaohang Wang, Youfang Wang, Zhenyu Wu, Tao Weng, Zhengyu Wang, Yihua Liu, Zheng Xiang, Ziji Chen, Xianhui Superconductivity The intimate connection between magnetism and superconducting pairing routinely plays a central role in determining the occurrence of unconventional superconducting states. In high-transition-temperature (high-Tc) stripe-ordered cuprate superconductors and a magnetically ordered iron-based superconductor, the coupling between magnetism and superconductivity gives birth to novel phases of matter with modulation of the superconducting pairing in the real space. Further exploration of these phases can shed light on the mechanism of unconventional superconductivity. Here we report on the discovery of a peculiar spatially-varying superconducting state residing at the interface between (110)-oriented KTaO3 and ferromagnetic EuO. Electrical transport measurements reveal different Tc and upper critical fields (Hc2) with current applied along the two orthogonal in-plane directions. Such anisotropy persistently occurs in the low-carrier-density samples that are characterized by strong coupling between Ta 5d and Eu 4f electrons, whereas in the high-carrier-density samples the coupling is weakened and Tc and Hc2 becomes isotropic. Complemented by local imaging of diamagnetism and theoretical analysis, our observations imply an unprecedented emergence of superconducting stripes wherein the phase coherence is established ahead of the rest of the interface, arising from a band-filling-dependent ferromagnetic proximity. The realization of such exotic superconducting states provides impetus for the study of novel physics in heterostructures possessing both magnetism and superconductivity. |
| title | Superconducting stripes induced by ferromagnetic proximity in an oxide heterostructure |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2402.16022 |