Hot-carrier thermal breakdown and S-type current–voltage characteristics in perforated graphene structures
Source abstract
Abstract
We investigate the carrier transport characteristics of a perforated graphene layer (PGL) composed of arrays of interdigital coplanar graphene microribbons (GMRs) connected by graphene nanoribbon (GNR) bridges. Our analysis focuses on their operation at room temperature. Under an applied bias voltage, two-dimensional electron and hole systems (2DES and 2DHS) form in adjacent GMRs. The terminal current in these PGL structures is primarily governed by thermionic transport across the GNR bridges. As electrons and holes traverse the GNRs, they induce heating in the 2DES and 2DHS, creating a positive feedback loop between carrier heating and thermionic emission. This phenomenon, known as hot-carrier thermal breakdown, can give rise to S-shaped inter-GMR current–voltage characteristics. These unique transport properties make PGLs promising candidates for fast, voltage-controlled room-temperature switches and electromagnetic radiation detectors.
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Research context
OpenAlex topics: Graphene research and applications · Semiconductor materials and devices · Advancements in Semiconductor Devices and Circuit Design
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Frontier Research Institute for Interdisciplinary Sciences, Tohoku University 1 , Sendai 980-8578,
Research Institute of Electrical Communication, Tohoku University 2 , Sendai 980-8577,
School of Computer Science and Engineering, University of Aizu 3 , Aizu-Wakamatsu 965-8580,
Department of Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute 4 , Troy, New York 12180,
Funding
JST ALCA-NEXT · NEDO · Murata Foundation · Iketani Foundation · ROHM Co., Ltd. · SCAT Foundation · US Airforce Office of Scientific Research
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