Summary
Two-dimensional (2D) quantum materials, such as graphene and molybdenum disulfide, have great potential for use in future flexible and wearable electronics applications. With traditional silicon-based electronics nearing their theoretical performance limits, nano-electronics made from 2D quantum materials offer breakthrough opportunities for energy-efficient, wearable ubiquitous computation.
In this project, we will study integration of 2D material electronic devices with ferroelectric (FE) layers to simultaneously achieve low-power and high-speed devices through material and design optimization. Using density functional theory (DFT) calculations, we will select optimal 2D materials for use in the active channels of transistors and develop models to describe the intricate physics of negative capacitance field-effect transistors (NC FETs) based on the FE-dielectric-2D material heterostructure. In the end, the project will develop a numerical simulation tool for 2D material NC FETs and verify our simulations through collaboration with experimental groups.

Figure 1. (a) A schematic of a 2D negative capacitance FET and (b) its equivalent capacitance network in equilibrium (VD = 0 V).
Related Content

Rydberg Atom Array Quantum Simulator
Summary Quantum simulators enable probing the static and dynamic properties of correlated quantum many-body systems that would otherwise be numerically inaccessible using classical simulators. We are developing quantum simulators based on arrays of neutral atoms excited to Rydberg states. Such Rydberg atom arrays are advantageous for simulating the dynamics of interacting spin systems (Ising spin […]
February 27, 2020

Applications of Neutron Interferometry and Structured Neutron Beams
Summary Neutrons are a powerful probe of matter and physics due to their Angstrom size wavelengths, electric neutrality and relatively large mass. In this project, we develop quantum sensors that exploit these attributes to increases the precision of measurements of fundamental forces and materials structure. With David Cory, Alexander Cronin of the University of Arizona, […]
July 31, 2018
Folk Understanding of Quantum Physics
Summary It is often said that quantum concepts are counterintuitive. However, quantum concepts may not be equally counterintuitive to people from all cultural backgrounds. As cultural psychologists have discovered, culture fundamentally shapes the way people make sense of the world. In particular, the last few decades of research have documented cultural differences in appreciation of […]
March 24, 2021
Fabrication of Ultra Low Noise RF SQUID Amplifiers
A superconducting quantum interference device (SQUID) is an extremely sensitive magnetic field detector.
June 1, 2017