Band anisotropy and effective mass renormalization in strained metallic VO2 (101) thin films
Year: 2024
Type: article
Abstract: We explore how strain impacts the band structure of metallic-phase VO2 thin films deposited on TiO2(101) substrates. Employing a combination of X-ray absorption linear dichroism and valence band measurements, we demonstrate that strain can alter the intrinsic band structure anisotropy of metallic VO2. Our findings reveal that reducing the thickness of VO2 films leads to a more isotropic band structure. This observation is further supported by an analysis of the electronic population redistribution in the $${d}_{{||}}{-}{\pi }^{* }$$ d || − π * bands, which affects the screening length and induces effective mass renormalization. Overall, our results underscore the potential of strain manipulation in tailoring the electronic structure uniformity of thin films, thereby expanding the scope for engineering VO2 functionalities.
Source: NPG Asia Materials
Authors: A. D’Elia, V. Polewczyk, A. Y. Petrov, G. Vinai, L. Li, C. W. Zou, S. J. Rezvani, A. Marcelli
Institutions: AREA Science Park, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Istituto Officina dei Materiali, University of Science and Technology of China, National Synchrotron Radiation Laboratory, Università di Camerino, Rome International Center for Materials Science
Language: English
Subfield: Polymers and Plastics
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,490
OpenAlex ID: W4404574701