|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Advances and Discoveries in Non-equilibrium Driven Nanomaterials and Thin Films
||Dynamically Evolving Metastability in an Atomic Hourglass: Temporal Control of the Metal-insulator Transition of VO2 by a Mobile Dopant
||Erick Braham, Diane Sellers, Ruben Villarreal, Raymundo Arroyave, Patrick Shamberger, Sarbajit Banerjee
|On-Site Speaker (Planned)
Continuous modification of metal-insulator transformation temperatures post hoc to synthesis is challenging to access but holds potential for endowing distinctive memory of thermal history as would be useful for neuromorphic computing, chronometry, and sensing. An entirely reversible and dynamical modulation of the phase transformation of VO2 has been observed when using a weakly-coupled mobile dopant. A remarkable time-dependent evolution of the relative phase stabilities of insulating monoclinic (M1) and metallic rutile (R) phases of VO2 in an “hourglass” fashion has been observed as interstitial boron species relax from high-energy sites where they are situated upon a thermally induced phase transition. The relaxation corresponds to a 50°C range of the transition temperature achieved within the same sample as a function of residence time and temperature. The diffusive boron dopant atoms provide a means of attaining a reconfigurable and readable time and thermal history dependent response that derives from intrinsic material properties.
||Planned: Supplemental Proceedings volume