科学者たちが新しい技術でエネルギー効率の高いマイクロ電子デバイスを開発(Scientists use novel technique to create new energy-efficient microelectronic device)

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2023-03-13 アルゴンヌ国立研究所(ANL)

マイクロエレクトロニクスの進化は、より強力なデバイスを作り出す一方で、そのサイズを小さくする方向に向かっています。アーゴンヌ国立研究所の研究者は、新しい「レドックスゲーティング」技術を提案し、これによって半導体材料内の電子の移動を制御することが可能となり、低電圧での大幅な省電力効果が得られることを示しました。この技術は、電子デバイスの性能向上だけでなく、量子物質の新たな相の制御にも役立つ可能性があります。

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巨大なキャリア変調とユニークな位相制御のためのレドックス・ゲーティング Redox Gating for Colossal Carrier Modulation and Unique Phase Control

Le Zhang, Changjiang Liu, Hui Cao, Andrew J. Erwin, Dillon D. Fong, Anand Bhattacharya, Luping Yu, Liliana Stan, Chongwen Zou, Matthew V. Tirrell, Hua Zhou, Wei Chen
Advanced Materials  Published: 06 January 2024
DOI:https://doi.org/10.1002/adma.202308871

科学者たちが新しい技術でエネルギー効率の高いマイクロ電子デバイスを開発(Scientists use novel technique to create new energy-efficient microelectronic device)

 

Abstract

Redox gating, a novel approach distinct from conventional electrolyte gating, combines reversible redox functionalities with common ionic electrolyte moieties to engineer charge transport, enabling power-efficient electronic phase control. This study achieves a colossal sheet carrier density modulation beyond 1016 cm−2, sustainable over thousands of cycles, all within the sub-volt regime for functional oxide thin films. The key advantage of this method lies in the controlled injection of a large quantity of carriers from the electrolyte into the channel material without the deleterious effects associated with traditional electrolyte gating processes such as the production of ionic defects or intercalated species. The redox gating approach offers a simple and practical means of decoupling electrical and structural phase transitions, enabling the isostructural metal-insulator transition and improved device endurance. The versatility of redox gating extends across multiple materials, irrespective of their crystallinity, crystallographic orientation, or carrier type (n- or p-type). This inclusivity encompasses functional heterostructures and low-dimensional quantum materials composed of sustainable elements, highlighting the broad applicability and potential of the technique in electronic devices.

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