У оквиру семинара Центра за изучавање комплексних система Института за физику у Београду, у четвртак, 31. октобра 2024. године у 14 часова у читаоници библиотеке „др Драган Поповић“, др Игор Станковић (Центар за изучавање комплексних система, Институт за физику у Београду), одржаће предавање:
Device models based on a controlled interplay of percolation, conductivity, and junction effects
САЖЕТАК:
In this talk, we will present recent advances in device modeling, focusing on the behavior of two-dimensional stick and nanosheet networks. First, we will explore percolation in widthless stick systems with varying aspect ratios using extensive Monte Carlo simulations. A generalized scaling function will be introduced, revealing that the system aspect ratio plays a critical role in percolation behavior [1]. We will identify a characteristic aspect ratio where percolation probability becomes scale-invariant. Next, we will address conductivity in random stick systems, modeling the transition from percolation-dominated to dense-network conductivity [2]. This model incorporates stick density, junction-to-stick conductance ratios, and finite-size scaling, offering insights into the structural influences on conductivity. Finally, we will discuss the challenges of translating individual electrical properties of 2D semiconductor nanosheets into networks of overlapping sheets. We will visualize electrostatic potential profiles in nanosheet transistors, identifying the key impact of junctions on current flow. A numerical model is developed to estimate current paths, improving our understanding of device performance in these complex networks. This talk will highlight the interplay of percolation, conductivity, and junction effects in device modeling, offering a comprehensive framework for analyzing random networks in electronic systems.
[1] M. Žeželj, I. Stanković, Phys. Rev. B 86, 134202 (2012).
[2] M. Žeželj, I. Stanković, and A. Belić, Phys. Rev. E 85, 021101 (2012).