Role of the lattice in the light-induced insulator-to-metal transition in vanadium dioxide
Vanadium dioxide is a model material system which exhibits a metal-to-insulator transition at 67^{∘}C. This holds potential for future ultrafast switching in memory devices but typically requires a purely electronic process to avoid the slow lattice response. The role of lattice vibrations is thus i...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2020-04-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.023076 |
| _version_ | 1827286169697648640 |
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| author | Cédric Weber Swagata Acharya Brian Cunningham Myrta Grüning Liangliang Zhang Hang Zhao Yong Tan Yan Zhang Cunlin Zhang Kai Liu Mark Van Schilfgaarde Mostafa Shalaby |
| author_facet | Cédric Weber Swagata Acharya Brian Cunningham Myrta Grüning Liangliang Zhang Hang Zhao Yong Tan Yan Zhang Cunlin Zhang Kai Liu Mark Van Schilfgaarde Mostafa Shalaby |
| author_sort | Cédric Weber |
| collection | DOAJ |
| description | Vanadium dioxide is a model material system which exhibits a metal-to-insulator transition at 67^{∘}C. This holds potential for future ultrafast switching in memory devices but typically requires a purely electronic process to avoid the slow lattice response. The role of lattice vibrations is thus important, but it is not fully understood and it has been a long-standing source of controversy. We use ultrafast spectroscopy and ab initio quantum calculations to study the mechanism responsible for the transition. We identify an atypical Peierls vibrational mode associated with the transition and study its associated properties. Our findings led to theoretical prediction of a new electron-phonon pathway for a purely reversible electronic transition in a true bistable fashion under specific conditions. This transition is very atypical, as it involves purely chargelike excitations and requires only small nuclear displacement and might prompt future experimental investigations. |
| first_indexed | 2024-04-24T10:26:54Z |
| format | Article |
| id | doaj.art-4625dc450c4e47d4bd696789d36459a5 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:26:54Z |
| publishDate | 2020-04-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-4625dc450c4e47d4bd696789d36459a52024-04-12T16:52:58ZengAmerican Physical SocietyPhysical Review Research2643-15642020-04-012202307610.1103/PhysRevResearch.2.023076Role of the lattice in the light-induced insulator-to-metal transition in vanadium dioxideCédric WeberSwagata AcharyaBrian CunninghamMyrta GrüningLiangliang ZhangHang ZhaoYong TanYan ZhangCunlin ZhangKai LiuMark Van SchilfgaardeMostafa ShalabyVanadium dioxide is a model material system which exhibits a metal-to-insulator transition at 67^{∘}C. This holds potential for future ultrafast switching in memory devices but typically requires a purely electronic process to avoid the slow lattice response. The role of lattice vibrations is thus important, but it is not fully understood and it has been a long-standing source of controversy. We use ultrafast spectroscopy and ab initio quantum calculations to study the mechanism responsible for the transition. We identify an atypical Peierls vibrational mode associated with the transition and study its associated properties. Our findings led to theoretical prediction of a new electron-phonon pathway for a purely reversible electronic transition in a true bistable fashion under specific conditions. This transition is very atypical, as it involves purely chargelike excitations and requires only small nuclear displacement and might prompt future experimental investigations.http://doi.org/10.1103/PhysRevResearch.2.023076 |
| spellingShingle | Cédric Weber Swagata Acharya Brian Cunningham Myrta Grüning Liangliang Zhang Hang Zhao Yong Tan Yan Zhang Cunlin Zhang Kai Liu Mark Van Schilfgaarde Mostafa Shalaby Role of the lattice in the light-induced insulator-to-metal transition in vanadium dioxide Physical Review Research |
| title | Role of the lattice in the light-induced insulator-to-metal transition in vanadium dioxide |
| title_full | Role of the lattice in the light-induced insulator-to-metal transition in vanadium dioxide |
| title_fullStr | Role of the lattice in the light-induced insulator-to-metal transition in vanadium dioxide |
| title_full_unstemmed | Role of the lattice in the light-induced insulator-to-metal transition in vanadium dioxide |
| title_short | Role of the lattice in the light-induced insulator-to-metal transition in vanadium dioxide |
| title_sort | role of the lattice in the light induced insulator to metal transition in vanadium dioxide |
| url | http://doi.org/10.1103/PhysRevResearch.2.023076 |
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