Transverse barrier formation by electrical triggering of a metal-to-insulator transition

Pavel Salev (), Lorenzo Fratino, Dayne Sasaki, Rani Berkoun, Javier del Valle, Yoav Kalcheim, Yayoi Takamura, Marcelo Rozenberg and Ivan K. Schuller
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Pavel Salev: University of California San Diego
Lorenzo Fratino: CNRS Laboratoire de Physique des Solides, 91405
Dayne Sasaki: University of California Davis
Rani Berkoun: CNRS Laboratoire de Physique des Solides, 91405
Javier del Valle: University of California San Diego
Yoav Kalcheim: University of California San Diego
Yayoi Takamura: University of California Davis
Marcelo Rozenberg: CNRS Laboratoire de Physique des Solides, 91405
Ivan K. Schuller: University of California San Diego

Nature Communications, 2021, vol. 12, issue 1, 1-7

Abstract: Abstract Application of an electric stimulus to a material with a metal-insulator transition can trigger a large resistance change. Resistive switching from an insulating into a metallic phase, which typically occurs by the formation of a conducting filament parallel to the current flow, is a highly active research topic. Using the magneto-optical Kerr imaging, we found that the opposite type of resistive switching, from a metal into an insulator, occurs in a reciprocal characteristic spatial pattern: the formation of an insulating barrier perpendicular to the driving current. This barrier formation leads to an unusual N-type negative differential resistance in the current-voltage characteristics. We further demonstrate that electrically inducing a transverse barrier enables a unique approach to voltage-controlled magnetism. By triggering the metal-to-insulator resistive switching in a magnetic material, local on/off control of ferromagnetism is achieved using a global voltage bias applied to the whole device.

Date: 2021
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DOI: 10.1038/s41467-021-25802-1

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