Unveiling van Hove singularity modulation and fluctuated charge order in kagome superconductor $\rm{CsV_3Sb_5}$ via time-resolved ARPES
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866910782364581888 |
|---|---|
| author | Zhong, Yigui Suzuki, Takeshi Liu, Hongxiong Liu, Kecheng Nie, Zhengwei Shi, Youguo Meng, Sheng Lv, Baiqing Ding, Hong Kanai, Teruto Itatani, Jiro Shin, Shik Okazaki, Kozo |
| author_facet | Zhong, Yigui Suzuki, Takeshi Liu, Hongxiong Liu, Kecheng Nie, Zhengwei Shi, Youguo Meng, Sheng Lv, Baiqing Ding, Hong Kanai, Teruto Itatani, Jiro Shin, Shik Okazaki, Kozo |
| contents | Kagome superconductor CsV3Sb5, which exhibits intertwined unconventional charge density wave (CDW) and superconductivity, has garnered significant attention recently. Despite extensive static studies, the nature of these exotic electronic orders remains elusive. In this study, we investigate the non-equilibrium electronic structure of CsV3Sb5 via time- and angle-resolved photoemission spectroscopy. Our results reveal that upon laser excitation, the van Hove singularities immediately shift towards the Fermi level and subsequently oscillate in sync with a 1.3 THz coherent phonon mode. By analyzing the coherent intensity oscillations in the energy-momentum (E-k) map, we find that this coherent phonon is strongly coupled with electronic bands from both Sb and V orbitals. While typically observable only in the CDW state, remarkably, we find that the 1.3-THz coherent phonon mode can be persistently excited at temperatures above T_CDW, suggesting the potential existence of fluctuated CDW in CsV3Sb5. These findings enhance our understanding of the unconventional CDW control of kagome superconductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_17015 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Unveiling van Hove singularity modulation and fluctuated charge order in kagome superconductor $\rm{CsV_3Sb_5}$ via time-resolved ARPES Zhong, Yigui Suzuki, Takeshi Liu, Hongxiong Liu, Kecheng Nie, Zhengwei Shi, Youguo Meng, Sheng Lv, Baiqing Ding, Hong Kanai, Teruto Itatani, Jiro Shin, Shik Okazaki, Kozo Materials Science Strongly Correlated Electrons Superconductivity Kagome superconductor CsV3Sb5, which exhibits intertwined unconventional charge density wave (CDW) and superconductivity, has garnered significant attention recently. Despite extensive static studies, the nature of these exotic electronic orders remains elusive. In this study, we investigate the non-equilibrium electronic structure of CsV3Sb5 via time- and angle-resolved photoemission spectroscopy. Our results reveal that upon laser excitation, the van Hove singularities immediately shift towards the Fermi level and subsequently oscillate in sync with a 1.3 THz coherent phonon mode. By analyzing the coherent intensity oscillations in the energy-momentum (E-k) map, we find that this coherent phonon is strongly coupled with electronic bands from both Sb and V orbitals. While typically observable only in the CDW state, remarkably, we find that the 1.3-THz coherent phonon mode can be persistently excited at temperatures above T_CDW, suggesting the potential existence of fluctuated CDW in CsV3Sb5. These findings enhance our understanding of the unconventional CDW control of kagome superconductivity. |
| title | Unveiling van Hove singularity modulation and fluctuated charge order in kagome superconductor $\rm{CsV_3Sb_5}$ via time-resolved ARPES |
| topic | Materials Science Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2407.17015 |