Beyond-Cmos Devices: Logic, Interconnects and Memory
Page: 1-98
2021
- 4Usage
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
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Thesis / Dissertation Description
With the scaling of very large-scale integrated circuits (VLSI), conventional CMOS technologies are facing many challenges. For example, Si-based logic devices suffer from ever increasing leakage-currents and do not exhibit the desired electrostatics with continuous scaling. Copper interconnects’ resistivity monotonically increases with reducing wire cross sections. Memory devices notoriously face power consumption problems. Thus, novel materials and devices have been explored to resolve these problems. In logic devices, semiconducting 2D transition metal dichcolcogenides (TMDs) were applied as the channel material to enable further channel length scaling. Besides, strain engineering was used to modulate the band structure of 2D TMDs to achieve better device performance. In Cu interconnects, an 2D MoS2 layer was inserted underneath thin Cu films and enhanced Cu’s electrical performance. By comparing the thickness dependence of Cu films’ resistivity on MoS2 and SiO2, MoS2 has been demonstrated that it can be used to enhance the electrical performance of ultrathin Cu films due to improved specular surface scattering by up to 40%. In memory devices, to reduce the energy consumption, we took advantage of electrical fields rather than currents to control magnetization. Taking advantage of the magnetoelectric (ME) and its inverse effect, a strain-mediated magnetoelectric write and read operation simultaneously in Co60Fe20B20/ Pb(Mg1/3Nb2/3)0.7Ti0.3O3 heterostructures was demonstrated based on a pseudo-magnetization µ ≡ mx2 -my 2 rather than a net magnetization mx, my or mz. Also, the write operation was verified by ferromagnetic resonance measurements in both PMN-PT/CoFeB films and PMN-PT/CoFeB nanodots. Furthermore, stress induced magnetic field and the interfacial coupling strength have been extracted. Last, voltage-controlled magnetism in Fe3GeTe2devices was discussed.
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