Chapter 4 - 2D heterostructures for advanced logic and memory devices

Abstract

Two-dimensional (2D) materials, particularly semiconductors, offer distinctive opportunities and advantages in the design and fabrication of multifunctional electronic and photonic devices due to their van der Waals nature and atomically thin structure. In this chapter, we first introduce 2D materials based field-effect transistors and short-channel effects in them. We further comment on their lateral and vertical scaling. Next, we discuss 2D homojunction and heterojunction devices including tunable diodes and tunneling devices, their fabrication, operation and applications. We then focus on their potential for low-power logic devices. Next, we focus on memory devices employing 2D semiconductors including transistor memories and two-terminal resistive memory (memristive) devices. We also discuss floating gate memories and ferroelectric memory devices employing 2D semiconductors. Finally, we discuss outstanding challenges and future opportunities for 2D materials in advanced logic and memory technologies.