Charge disproportionate molecular redox for discrete memristive and memcapacitive switching

Goswami, Sreetosh (author)

Rath, Santi P. (author)

Thompson, Damien (author)

Annamalai, Meenakshi (author)

Pramanick, Rajib (author)

Ilic, B. Robert (author)

Sarkar, Soumya (author)

Hooda, Sonu (author)

Nijhuis, Christian A. (author)

Martin, Jens (author)

Williams, R. Stanley (author)

Goswami, Sreebrata (author)

Venkatesan, T. (author)

(creator_code:org_t)

2020-03-23
2020
English.
In: Nature Nanotechnology. - : Springer Science and Business Media LLC. - 1748-3387 .- 1748-3395. ; 15:5, s. 380-389

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Abstract Subject headings

Electronic symmetry breaking by charge disproportionation results in multifaceted changes in the electronic, magnetic and optical properties of a material, triggering ferroelectricity, metal/insulator transition and colossal magnetoresistance. Yet, charge disproportionation lacks technological relevance because it occurs only under specific physical conditions of high or low temperature or high pressure. Here we demonstrate a voltage-triggered charge disproportionation in thin molecular films of a metal-organic complex occurring in ambient conditions. This provides a technologically relevant molecular route for simultaneous realization of a ternary memristor and a binary memcapacitor, scalable down to a device area of 60 nm(2). Supported by mathematical modelling, our results establish that multiple memristive states can be functionally non-volatile, yet discrete-a combination perceived as theoretically prohibited. Our device could be used as a binary or ternary memristor, a binary memcapacitor or both concomitantly, and unlike the existing 'continuous state' memristors, its discrete states are optimal for high-density, ultra-low-energy digital computing. Charge disproportionation in thin molecular films of a metal-organic complex enables the realization of a ternary memristor and binary memcapacitor.

By the author/editor: Goswami, Sreetos ...; Rath, Santi P.; Thompson, Damien; Hedström, Svante; Annamalai, Meena ...; Pramanick, Rajib; show more...; Ilic, B. Robert; Sarkar, Soumya; Hooda, Sonu; Nijhuis, Christi ...; Martin, Jens; Williams, R. Sta ...; Goswami, Sreebra ...; Venkatesan, T.; show less...

About the subject

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