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In situ electronic structural study of VO 2 thin film across the metal—insulator transition
| Content Provider | Scilit |
|---|---|
| Author | Emin, Muhemmed Abduleziz, Ablat Wu, Rui Wang, Jia-Ou Qian, Hai-Jie Kurash, Ibrahim |
| Copyright Year | 2013 |
| Description | Journal: Chinese Physics B The in situ valence band photoemission spectrum (PES) and X-ray absorption spectrum (XAS) at V LII — LIII edges of the VO2 thin film, which is prepared by pulsed laser deposition, are measured across the metal—insulator transition (MIT) temperature (TMIT = 67 °C). The spectra show evidence for changes in the electronic structure depending on temperature. Across the TMIT, pure V 3d characteristic d‖ and O 2p-V 3d hybridization characteristic πpd, σpd bands vary in binding energy position and density of state distributions. The XAS reveals a temperature-dependent reversible energy shift at the V LIII-edge. The PES and XAS results imply a synergetic energy position shift of occupied valence bands and unoccupied conduction band states across the phase transition. A joint inspection of the PES and XAS results shows that the MIT is not a one-step process, instead it is a process in which a semiconductor phase appears as an intermediate state. The final metallic phase from insulating state is reached through insulator—semiconductor, semiconductor—metal processes, and vice versa. The conventional MIT at around the TMIT = 67 °C is actually a semiconductor—insulator transformation point. |
| Related Links | http://iopscience.iop.org/1674-1056/22/12/127103/pdf/1674-1056_22_12_127103.pdf |
| ISSN | 16741056 |
| e-ISSN | 20583834 |
| DOI | 10.1088/1674-1056/22/12/127103 |
| Journal | Chinese Physics B |
| Issue Number | 12 |
| Volume Number | 22 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2013-12-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Chinese Physics B Applied Physics Electronic Structure Phase Transition Insulator Transition Thin Film Across the Metal Metal Processes Absorption Spectrum |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physics and Astronomy |
