Surface region band enhancement in noble gas adsorption assisted ARPES on kagome superconductor RbV3Sb5
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866929281169358848 |
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| author | Peng, Cao Li, Yiwei Chen, Xu Dai, Shenghao Wu, Zewen Wu, Chunlong Wan, Qiang Zhao, Keming Li, Renzhe Mo, Shangkun Qin, Dingkun Yu, Shuming Zhong, Hao Yuan, Shengjun Guo, Jiangang Xu, Nan |
| author_facet | Peng, Cao Li, Yiwei Chen, Xu Dai, Shenghao Wu, Zewen Wu, Chunlong Wan, Qiang Zhao, Keming Li, Renzhe Mo, Shangkun Qin, Dingkun Yu, Shuming Zhong, Hao Yuan, Shengjun Guo, Jiangang Xu, Nan |
| contents | Electronic states near surface regions can be distinct from bulk states, which are paramount in understanding various physical phenomena occurring at surfaces and in applications in semiconductors, energy, and catalysis. Here, we report an abnormal surface region band enhancement effect in angle-resolved photoemission spectroscopy on kagome superconductor RbV3Sb5, by depositing noble gases with fine control. In contrast to conventional surface contamination, the intensity of surface region Sb band can be enhanced more than three times with noble gas adsorption. In the meantime, a hole-dope effect is observed for the enhanced surface region band, with other bands hardly changing. The doping effect is more pronounced with heavier noble gases. We propose that noble gas atoms selectively fill into alkali metal vacancy sites on the surface, which improves the surface condition, boosts surface region bands, and effectively dopes it with the Pauli repulsion mechanism. Our results provide a novel and reversible way to improve surface conditions and tune surface region bands by controlled surface noble gas deposition. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_11416 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Surface region band enhancement in noble gas adsorption assisted ARPES on kagome superconductor RbV3Sb5 Peng, Cao Li, Yiwei Chen, Xu Dai, Shenghao Wu, Zewen Wu, Chunlong Wan, Qiang Zhao, Keming Li, Renzhe Mo, Shangkun Qin, Dingkun Yu, Shuming Zhong, Hao Yuan, Shengjun Guo, Jiangang Xu, Nan Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons Electronic states near surface regions can be distinct from bulk states, which are paramount in understanding various physical phenomena occurring at surfaces and in applications in semiconductors, energy, and catalysis. Here, we report an abnormal surface region band enhancement effect in angle-resolved photoemission spectroscopy on kagome superconductor RbV3Sb5, by depositing noble gases with fine control. In contrast to conventional surface contamination, the intensity of surface region Sb band can be enhanced more than three times with noble gas adsorption. In the meantime, a hole-dope effect is observed for the enhanced surface region band, with other bands hardly changing. The doping effect is more pronounced with heavier noble gases. We propose that noble gas atoms selectively fill into alkali metal vacancy sites on the surface, which improves the surface condition, boosts surface region bands, and effectively dopes it with the Pauli repulsion mechanism. Our results provide a novel and reversible way to improve surface conditions and tune surface region bands by controlled surface noble gas deposition. |
| title | Surface region band enhancement in noble gas adsorption assisted ARPES on kagome superconductor RbV3Sb5 |
| topic | Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2403.11416 |