Journal article Volatile resistive-switched state in a bulk organic conductor with a sharp metal-insulator transition
Riku Ishii (author) (Search by this author)
;
Ryo Motohashi (author) (Search by this author)
;
Keitaro Tada (author) (Search by this author)
;
Yusuke Suzuki (author) (Search by this author)
;
Takayoshi Kouchi (author) (Search by this author)
;
Hiroshi Oike (author) (Search by this author)
ORCID https://orcid.org/0000-0001-6866-7774
National Institute for Materials Science
SAMURAI NIMS Researchers Directory SAMURAI
ORCID SAMURAI ;
Fumitaka Kagawa (author) (Search by this author)
;
Reizo Kato (author) (Search by this author)
;
Tetsuaki Itou (author) (Search by this author)
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Citation
Riku Ishii, Ryo Motohashi, Keitaro Tada, Yusuke Suzuki, Takayoshi Kouchi, Hiroshi Oike, Fumitaka Kagawa, Reizo Kato, Tetsuaki Itou. Volatile resistive-switched state in a bulk organic conductor with a sharp metal-insulator transition. Physical Review Applied. 2026, 26 (2), 024041. https://doi.org/10.1103/3yjz-8f9d

Description:

(abstract)

Volatile resistive switching in correlated-electron systems, characterized by an abrupt resistance decrease　under applied current, is crucial for developing next-generation electronics. Despite its technological significance, the underlying physics remains elusive. Inorganic thin films on substratesthe widely studied platform for resistive switchingusually exhibit broad temperature-induced metalinsulator transitions (MITs) and substantial heat dissipation. These factors complicate the nonlinear thermal effect induced by Joule heating, a key contributor to resistive switching, rendering it excessively complex and difficult to decipher. Here we investigate a resistive-switched state in the bulk organic conductor (d7-DMe-DCNQI)2Cu, which undergoes an extremely sharp first-order MIT and exhibits weak heat dissipation, using resistance and 1H-NMR measurements. These extreme conditions make the Joule heating effect vivid, allowing us to observe peculiar phenomena, including temperature locking to the MIT and ’Inverse Ohm’s law’an inverse proportionality between voltage and current. These findings provide fundamental insights into the nonlinear thermal effect in resistive switching, offering a pathway to efficient resistive-switching technologies.

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Keyword: Metal-insulator transition, Nonequilibrium systems, Resistive switching, Strongly correlated systems

Date published: 2026-08-17

Publisher: American Physical Society (APS)

Journal:

  • Physical Review Applied (ISSN: 23317019) vol. 26 issue. 2 024041

Funding:

  • Japan Society for the Promotion of Science 22H01184
  • Japan Society for the Promotion of Science 19H01852
  • Japan Society for the Promotion of Science 18H05225
  • Japan Science and Technology Agency JPMJCR23A1

Manuscript type: Author's version (Accepted manuscript)

MDR DOI:

First published URL: https://doi.org/10.1103/3yjz-8f9d

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Updated at: 2026-09-11 10:35:18 +0900

Published on MDR: 2026-09-11 14:26:07 +0900

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