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A Graphene-Based Straintronic Physically Unclonable Function
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DOI：10.1021/acs.nanolett.3c01145.png)
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摘要
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Physically unclonable functions (PUFs) are an integralpart ofmodern-day hardware security. Various types of PUFs already exist,including optical, electronic, and magnetic PUFs. Here, we introducea novel straintronic PUF (SPUF) by exploiting strain-induced reversiblecracking in the contact microstructures of graphene field-effect transistors(GFETs). We found that strain cycling in GFETs with a piezoelectricgate stack and high-tensile-strength metal contacts can lead to anabrupt transition in some GFET transfer characteristics, whereas otherGFETs remain resilient to strain cycling. Strain sensitive GFETs showcolossal ON/OFF current ratios >10(7), whereas strain-resilientGFETs show ON/OFF current ratios <10. We fabricated a total of25 SPUFs, each comprising 16 GFETs, and found near-ideal performance.SPUFs also demonstrated resilience to regression-based machine learning(ML) attacks in addition to supply voltage and temporal stability.Our findings highlight the opportunities for emerging straintronicdevices in addressing some of the critical needs of the microelectronicsindustry.
Keyword:
PUF
Straintronics
Graphene
PZT
期刊
IF:
9.1
论文数:
2.7W
被引数:
16.5W
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Exploiting Process Variations and Programming Sensitivity of Phase Change Memory for Reconfigurable Physical Unclonable Functions利用可重构物理不可克隆功能的相变存储器的工艺变化和编程敏感性
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