M. Aldrigo;M. Dragoman;A. Dinescu;D. Vasilache;S. Iordanescu;L. A. Dinu;D. Dragoman;E. Laudadio;E. Pavoni;L. Pierantoni;D. Mencarelli
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引用次数: 0
摘要
在这封信中,我们全面研究了一种在高电阻率硅衬底上具有石墨烯/铁电通道的平面场效应晶体管(FET),这种场效应晶体管能够在低温条件下将入射微波功率转换为低至 100 K 的热释电电压。这种选择有两个目的:1)在石墨烯单层中形成带隙;2)降低石墨烯的热导率,从而促进热释电电流的产生。从量子模拟评估通道的电学行为开始,我们在低温装置中测量到了在 2 GHz 和 100 K 时检测到的最大热释电电压约为 18 mV。此外,检测到的瞬态脉冲符合薄膜铁电的典型特征--孤子。
Demonstration of Microwave Harvesting Through Pyroelectricity in Cryogenic Conditions: A Quantum-to-Experimental Approach
In this letter, we present a comprehensive study of a planar field effect transistor (FET) with a graphene/ferroelectric channel on high-resistivity silicon substrate, able to convert the incident microwave power into a pyroelectric voltage in cryogenic conditions down to 100 K. The FET is based on a graphene monolayer/zirconium-doped hafnium oxide (HZO) heterostructure, being the graphene perforated with a matrix of nanoholes. This choice has two aims: 1) to create a bandgap in the graphene monolayer and 2) to reduce graphene’s thermal conductivity, thereby promoting the generation of a pyroelectric current. Starting from quantum simulations to assess the electrical behavior of the channel, we measured in a cryogenic setup a maximum detected pyroelectric voltage of about 18 mV at 2 GHz and at 100 K. Moreover, the detected transient pulses fit in to solitons, which are typical for thin film ferroelectrics.