Band Renormalization in Monolayer MoS2 Induced by Multipole Screening
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866911634688049152 |
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| author | Lee, Woojoo Yoo, Seungwoo Zacharias, Marios Choi, Junho Kwon, Young-Kyun |
| author_facet | Lee, Woojoo Yoo, Seungwoo Zacharias, Marios Choi, Junho Kwon, Young-Kyun |
| contents | Dielectric screening plays a crucial role in shaping the electronic structure of two-dimensional (2D) materials. In 2D semiconductors, screened Coulomb interactions arising from the surrounding dielectric environment are known to induce band renormalization, which is typically understood as a rigid shift of the electronic bands. Here, we experimentally demonstrate that dielectric screening can also give rise to non-rigid, momentum-dependent band renormalization. Using temperature-dependent angle-resolved photoemission spectroscopy (ARPES), we observe pronounced changes in the electronic band structure of monolayer MoS2 on a highly oriented pyrolytic graphite (HOPG) substrate. The results indicate that temperature-driven variations in the effective interlayer separation modulate the dielectric screening experienced by monolayer MoS2. At room temperature, the screening behavior is well described by a momentum-independent monopole approximation, whereas at liquid-helium temperatures the screening evolves into a multipole-like regime, leading to momentum-dependent band shifts. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_02857 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Band Renormalization in Monolayer MoS2 Induced by Multipole Screening Lee, Woojoo Yoo, Seungwoo Zacharias, Marios Choi, Junho Kwon, Young-Kyun Strongly Correlated Electrons Materials Science Dielectric screening plays a crucial role in shaping the electronic structure of two-dimensional (2D) materials. In 2D semiconductors, screened Coulomb interactions arising from the surrounding dielectric environment are known to induce band renormalization, which is typically understood as a rigid shift of the electronic bands. Here, we experimentally demonstrate that dielectric screening can also give rise to non-rigid, momentum-dependent band renormalization. Using temperature-dependent angle-resolved photoemission spectroscopy (ARPES), we observe pronounced changes in the electronic band structure of monolayer MoS2 on a highly oriented pyrolytic graphite (HOPG) substrate. The results indicate that temperature-driven variations in the effective interlayer separation modulate the dielectric screening experienced by monolayer MoS2. At room temperature, the screening behavior is well described by a momentum-independent monopole approximation, whereas at liquid-helium temperatures the screening evolves into a multipole-like regime, leading to momentum-dependent band shifts. |
| title | Band Renormalization in Monolayer MoS2 Induced by Multipole Screening |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2604.02857 |