Small polarons mediated near-room-temperature metal-insulator transition in vanadium dioxide and their hopping dynamics
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866910794968465408 |
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| author | Liu, Xiongfang Yang, Tong Chen, Shanquan Wu, Jing Tang, Chi Sin Ning, Yuanjie Chen, Zuhuang Dai, Liang Sun, Mengxia Chen, Mingyao Han, Kun Zhou, Difan Zeng, Shengwei Sun, Shuo Li, Sensen Yang, Ming Breese, Mark B. H. Cai, Chuanbing Venkatesan, Thirumalai Wee, Andrew T. S. Yin, Xinmao |
| author_facet | Liu, Xiongfang Yang, Tong Chen, Shanquan Wu, Jing Tang, Chi Sin Ning, Yuanjie Chen, Zuhuang Dai, Liang Sun, Mengxia Chen, Mingyao Han, Kun Zhou, Difan Zeng, Shengwei Sun, Shuo Li, Sensen Yang, Ming Breese, Mark B. H. Cai, Chuanbing Venkatesan, Thirumalai Wee, Andrew T. S. Yin, Xinmao |
| contents | Researchers pursuing advanced photoelectric devices have discovered near room-temperature metal-insulator transitions (MIT) in non-volatile VO2. Despite theoretical investigations suggesting that polaron dynamics mediate the MIT, direct experimental evidence remains scarce. In this study, we present direct evidence of the polaron state in insulating VO2 through high-resolution spectroscopic ellipsometry measurements and first-principles calculations. We illustrate the complementary role of polaron dynamics in facilitating Peierls and Mott transitions, thereby contributing to the MIT processes. Furthermore, our observations and characterizations of conventional metallic and correlated plasmons in the respective phases of the VO2 film offer valuable insights into their electron structures. This investigation enhances comprehension of the MIT mechanism in correlated systems and underscores the roles of polarons, lattice distortions, and electron correlations in facilitating phase transition processes in strongly-correlated systems. Additionally, the detailed detection of small polarons and plasmons serves as inspiration for the development of new device functionalities. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_17419 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Small polarons mediated near-room-temperature metal-insulator transition in vanadium dioxide and their hopping dynamics Liu, Xiongfang Yang, Tong Chen, Shanquan Wu, Jing Tang, Chi Sin Ning, Yuanjie Chen, Zuhuang Dai, Liang Sun, Mengxia Chen, Mingyao Han, Kun Zhou, Difan Zeng, Shengwei Sun, Shuo Li, Sensen Yang, Ming Breese, Mark B. H. Cai, Chuanbing Venkatesan, Thirumalai Wee, Andrew T. S. Yin, Xinmao Applied Physics Materials Science Researchers pursuing advanced photoelectric devices have discovered near room-temperature metal-insulator transitions (MIT) in non-volatile VO2. Despite theoretical investigations suggesting that polaron dynamics mediate the MIT, direct experimental evidence remains scarce. In this study, we present direct evidence of the polaron state in insulating VO2 through high-resolution spectroscopic ellipsometry measurements and first-principles calculations. We illustrate the complementary role of polaron dynamics in facilitating Peierls and Mott transitions, thereby contributing to the MIT processes. Furthermore, our observations and characterizations of conventional metallic and correlated plasmons in the respective phases of the VO2 film offer valuable insights into their electron structures. This investigation enhances comprehension of the MIT mechanism in correlated systems and underscores the roles of polarons, lattice distortions, and electron correlations in facilitating phase transition processes in strongly-correlated systems. Additionally, the detailed detection of small polarons and plasmons serves as inspiration for the development of new device functionalities. |
| title | Small polarons mediated near-room-temperature metal-insulator transition in vanadium dioxide and their hopping dynamics |
| topic | Applied Physics Materials Science |
| url | https://arxiv.org/abs/2312.17419 |