biostudies-literatureShiga DMEXTJapan Society for the Promotion of Science (JSPS)Japan Science and Technology Agency (JST)Japan Science and Technology AgencyJapan Society for the Promotion of Science36743https://www.ebi.ac.uk/biostudies/studies/S-EPMC12540892biostudies-literatureUnknown15(1)We investigated the origin of collective electronic phase transitions induced at the heterointerface between monoclinic insulating VO<sub>2</sub> and rutile metallic electron-doped VO<sub>2</sub> layers using in situ soft X-ray photoemission spectroscopy (PES) and X-ray absorption spectroscopy (XAS) on nanoscale VO<sub>2</sub>/V<sub>0.99</sub>W<sub>0.01</sub>O<sub>2</sub> (001)<sub>R</sub> bilayers. Thanks to the surface sensitivity of PES and XAS, we determined the changes in the electronic structure and V-V dimerization in each constituent layer separately. The layer selective observation of the electronic and crystal structures in the upper VO<sub>2</sub> layer of the bilayer indicates that the monoclinic insulating phase VO<sub>2</sub> layer undergoes a transition to the rutile metalliScientific reportsInterface-induced collective phase transition in VO<sub>2</sub>-based bilayers studied by layer selective spectroscopy.PMC12540892JPMJCR18T1JPMXP112268343021K2049822H0194720KK0117Inoue SKumigashira HSantander-Syro AFShiga DYoshimatsu KHasegawa NHoriba KKanda TKitamura MfalseInterface-induced collective phase transition in VO<sub>2</sub>-based bilayers studied by layer selective spectroscopy.We investigated the origin of collective electronic phase transitions induced at the heterointerface between monoclinic insulating VO<sub>2</sub> and rutile metallic electron-doped VO<sub>2</sub> layers using in situ soft X-ray photoemission spectroscopy (PES) and X-ray absorption spectroscopy (XAS) on nanoscale VO<sub>2</sub>/V<sub>0.99</sub>W<sub>0.01</sub>O<sub>2</sub> (001)<sub>R</sub> bilayers. Thanks to the surface sensitivity of PES and XAS, we determined the changes in the electronic structure and V-V dimerization in each constituent layer separately. The layer selective observation of the electronic and crystal structures in the upper VO<sub>2</sub> layer of the bilayer indicates that the monoclinic insulating phase VO<sub>2</sub> layer undergoes a transition to the rutile metalli2025-01-01T00:00:00Z2025 Oct2026-06-04T15:05:24.636Z2026-06-02T03:08:50.43ZS-EPMC125408924112051510.1038/s41598-025-20752-w