This paper presents an effective compact model of current transfer for the estimation of hysteresis parameters on the volt-ampere characteristics of resonant-tunneling diodes. In the framework of the compact model, the appearance of hysteresis is explained as a manifestation of internal bistability due to interelectronic interaction in the channel of the resonant-tunneling structure. Unlike the models based on the method of equivalent circuits, the interelectronic interaction in the compact model is taken into account using the concentration parameter. Model validation allowed us to confirm the high accuracy of the model not only at the initial section of the volt-ampere characteristics, but also at the hysteresis parameters traditionally predicted with low accuracy, namely the loop width (∆ < 0.5%) and contrast (∆ < 7%). Thus, it is concluded that the models are promising for integration into systems for synthesizing the electrical characteristics of resonant-tunneling diodes.
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http://dx.doi.org/10.3390/s23187977 | DOI Listing |
Adv Sci (Weinh)
January 2025
Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, 37673, South Korea.
Negative differential resistance (NDR) is the key feature of resonant tunneling diodes exploited for high-frequency and low-power devices and recent studies have focused on NDR in van der Waals heterostructures and nanoscale materials. Here, strong NDR confined along a 1-nm-wide 1D channel within a van der Waals layer 1T-TaS is reported. Using scanning tunneling microscopy, a double 1D NDR channel formed along the sides of a charge-density-wave domain wall of 1T-TaS is found.
View Article and Find Full Text PDFACS Photonics
October 2024
Institute of Photonics, SUPA Dept of Physics, University of Strathclyde, Glasgow G11XQ, United Kingdom.
Interconnectivity between functional building blocks (such as neurons and synapses) represents a fundamental functionality for realizing neuromorphic systems. However, in the domain of neuromorphic photonics, synaptic interlinking and cascadability of spiking optical artificial neurons remains challenging and mostly unexplored in experiments. In this work, we report an optical synaptic link between optoelectronic spiking artificial neurons based upon resonant tunneling diodes (RTDs) that allows for cascadable spike propagation.
View Article and Find Full Text PDFACS Nano
October 2024
Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro ,Tokyo153-8505, Japan.
Resonant tunneling diodes (RTDs) are a core technology in III-V semiconductor devices. The realization of high-performance RTD using two-dimensional (2D) materials has been long awaited, but it has yet to be accomplished. To this end, we investigate a range of WSe/-BN/WSe RTD devices by varying the number of layers of source and drain WSe.
View Article and Find Full Text PDFJ Mol Model
October 2024
Faculty of Electrical and Computer Engineering, Semnan University, Semnan, Iran.
Context: Photodetectors utilizing donor/acceptor (D/A) molecules have the capacity to detect light through molecular interactions between a donor and an acceptor molecule. These devices leverage electronic or optical changes within molecules when exposed to light, resulting in observable modifications. The unique properties of photodetectors with D/A molecules make them valuable tools in various fields, including molecular electronics.
View Article and Find Full Text PDFNat Commun
August 2024
Department of Physics, University of Basel, Basel, Switzerland.
Phosphorus pentamers (cyclo-P) are unstable in nature but can be synthesized at the Ag(111) surface. Unlike monolayer black phosphorous, little is known about their electronic properties when in contact with metal electrodes, although this is crucial for future applications. Here, we characterize the atomic structure of cyclo-P assembled on Ag(111) using atomic force microscopy with functionalized tips and density functional theory.
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