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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/2410.19577 |
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| _version_ | 1866915093296447488 |
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| author | Huang, Wantong Lin, Haicheng Yin, Yuguo Zheng, Cheng Chen, Wei Ji, Lichen Hughes, Jack Kusmartsev, Fedor Kusmartseva, Anna Xue, Qi-Kun Chen, Xi Ji, Shuai-Hua |
| author_facet | Huang, Wantong Lin, Haicheng Yin, Yuguo Zheng, Cheng Chen, Wei Ji, Lichen Hughes, Jack Kusmartsev, Fedor Kusmartseva, Anna Xue, Qi-Kun Chen, Xi Ji, Shuai-Hua |
| contents | Two-dimensional (2D) superconductors that reside on substrates must be influenced by Rashba spin-orbit coupling (SOC). The intriguing effect of Rashba-type SOCs on iron-based superconductors (IBSs) has remained largely a mystery. In this work, we unveil modified Landau-level spectroscopy and the intricate band splitting of FeSe monolayers through the precision of scanning tunneling spectroscopy, which unequivocally demonstrates the presence of Rashba SOC. The discovery sheds light on a nonparabolic electron band at the X/Y point, displaying a distinctive Landau quantization behavior characterized by $E_n\propto(nB)^{4/3}$. The theoretical model aligns with our experimental insights, positing that the k$^4$-term of the electron band becomes predominant and profoundly reshapes the band structure. Our research underscores the pivotal role of the Rashba SOC effect on 2D superconductors and sets the stage to probe new quantum states in systems with remarkably low carrier concentrations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_19577 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Landau-Level Quantization and Band Splitting of FeSe Monolayers Revealed by Scanning Tunneling Spectroscopy Huang, Wantong Lin, Haicheng Yin, Yuguo Zheng, Cheng Chen, Wei Ji, Lichen Hughes, Jack Kusmartsev, Fedor Kusmartseva, Anna Xue, Qi-Kun Chen, Xi Ji, Shuai-Hua Superconductivity Mesoscale and Nanoscale Physics Two-dimensional (2D) superconductors that reside on substrates must be influenced by Rashba spin-orbit coupling (SOC). The intriguing effect of Rashba-type SOCs on iron-based superconductors (IBSs) has remained largely a mystery. In this work, we unveil modified Landau-level spectroscopy and the intricate band splitting of FeSe monolayers through the precision of scanning tunneling spectroscopy, which unequivocally demonstrates the presence of Rashba SOC. The discovery sheds light on a nonparabolic electron band at the X/Y point, displaying a distinctive Landau quantization behavior characterized by $E_n\propto(nB)^{4/3}$. The theoretical model aligns with our experimental insights, positing that the k$^4$-term of the electron band becomes predominant and profoundly reshapes the band structure. Our research underscores the pivotal role of the Rashba SOC effect on 2D superconductors and sets the stage to probe new quantum states in systems with remarkably low carrier concentrations. |
| title | Landau-Level Quantization and Band Splitting of FeSe Monolayers Revealed by Scanning Tunneling Spectroscopy |
| topic | Superconductivity Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2410.19577 |