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High-Field Domain: The Main Contributor to the Insulator-Metal Transition in (Vcr)o Under Electric Pulses

SSRN, ISSN: 1556-5068
2024
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    71

Article Description

Unraveling the mechanisms of insulator-to-metal transitions (IMT) is crucial both for the basic understanding of the microscopic processes and for exploring novel functionalities. The challenge in distinguishing between the thermal- and field-driven effects that dominate the IMT arises from the concurrent Joule heating. We propose a unique system, (VCr)O, exhibiting the first-order paramagnetic metallic to insulating transition during heating, and thus it separates the contribution from heating and/or field naturally: a pulsed electric field drives the resistance decrease, whereas a thermal process increases the resistance value due to the high-temperature insulating state. Moreover, our stimulation results indicate that the calculated high-field domains in a non-equilibrium state may be responsible for the electric pulses induced IMT, not common Joule heating.

Bibliographic Details

Yongchang Ma; Xiaotong Chen; Guoqiang Xiao; Li Du

Elsevier BV

Multidisciplinary; insulator-to-metal transitions; Joule heating; high-field domains; high-temperature insulating state

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