Lee, Minjong Kim, Tae Wook Park, Chang Yong Lee, Kimoon Taniguchi, Takashi Watanabe, Kenji Kim, Min-gu Hwang, Do Kyung Lee, Young Tack 2024-01-19T10:30:52Z 2024-01-19T10:30:52Z 2023-02-03 2023-01 2311-6706 https://pubs.kist.re.kr/handle/201004/114138 Two-dimensional van der Waals (2D vdW) material-based heterostructure devices have been widely studied for high-end electronic applications owing to their heterojunction properties. In this study, we demonstrate graphene (Gr)-bridge heterostructure devices consisting of laterally series-connected ambipolar semiconductor/Gr-bridge/n-type molybdenum disulfide as a channel material for field-effect transistors (FET). Unlike conventional FET operation, our Gr-bridge devices exhibit non-classical transfer characteristics (humped transfer curve), thus possessing a negative differential transconductance. These phenomena are interpreted as the operating behavior in two series-connected FETs, and they result from the gate-tunable contact capacity of the Gr-bridge layer. Multi-value logic inverters and frequency tripler circuits are successfully demonstrated using ambipolar semiconductors with narrow- and wide-bandgap materials as more advanced circuit applications based on non-classical transfer characteristics. Thus, we believe that our innovative and straightforward device structure engineering will be a promising technique for future multi-functional circuit applications of 2D nanoelectronics. English SHANGHAI JIAO TONG UNIV PRESS Graphene Bridge Heterostructure Devices for Negative Differential Transconductance Circuit Applications Article 10.1007/s40820-022-01001-5 1 Nano-Micro Letters, v.15, no.1 Nano-Micro Letters 15 1 Y scie scopus 000905971800005 2-s2.0-85145350580 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Science & Technology - Other Topics Materials Science Physics Article FIELD-EFFECT TRANSISTORS HEXAGONAL BORON-NITRIDE LIGHT-EMITTING DIODE OPTICAL-PROPERTIES MOS2 TRANSISTORS BAND-GAP METAL RESISTANCE NANOSHEET SCHOTTKY Frequency tripler Graphene bridge Heterostructure device Non-classical transfer characteristics Multi-value logic inverter