Ginzburg-Landau theory of metal-insulator transition in VO2: The electronic degrees of freedom

Yin Shi, Fei Xue, Long Qing Chen

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


VO2 is a well-known strongly correlated system which exhibits an intriguing metal-insulator transition slightly above room temperature. Based on symmetry consideration, we propose a phenomenological Ginzburg-Landau potential incorporating both a structural order parameter and a spin-correlation order parameter, to explicitly capture the structural distortion and the electronic phase transition in VO2. With the help of the additional spin-correlation order parameter, we calculate consistently temperature-stress (strain) phase diagrams of VO2 under different mechanical boundary conditions, which show good agreement with existing experimental observations. The phenomenological potential is suitable for the implementation in phase-field simulations to further investigate the stable phases, morphology and evolution of domain structures under various mechanical and electrical stimuli.

Original languageEnglish (US)
Article number46003
Issue number4
StatePublished - Nov 2017

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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