Spinodal electronic phase separation during insulator-metal transitions

Shi, Yin; Chen, Long-Qing

doi:10.1103/physrevb.102.195101

Spinodal electronic phase separation during insulator-metal transitions

Journal Article · Mon Nov 02 00:00:00 EST 2020 · Physical Review. B

DOI:https://doi.org/10.1103/physrevb.102.195101· OSTI ID:1853470

^[1]; Chen, Long-Qing ^[2]

Pennsylvania State Univ., University Park, PA (United States); OSTI
Pennsylvania State Univ., University Park, PA (United States)

Electronic phase transitions such as insulator-metal transitions are common in strongly correlated systems. Here, using a combination of thermodynamic linear-stability analysis and phase-field simulations and employing VO₂ as a prototypical example, we predict that an insulator-metal transition driven by photoexcitation may involve an intermediate, modulated charge density state with a temperature-dependent characteristic wavelength. It is shown that such an intermediate two-phase electronic state is formed through a spinodal mechanism and that its formation can be generic for insulator-metal transitions driven by fast stimuli. This transient electronic phase separation is expected to stimulate future experimental and computational efforts.

View Accepted Manuscript (DOE)

Research Organization:: Pennsylvania State University, University Park, PA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0020145

OSTI ID:: 1853470

Journal Information:: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 19 Vol. 102; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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