Two-dimensional (2D) layers just one atom thick can be stripped from certain materials, such as graphene. The individual layers from one or more of these materials can then be restacked to create cage-like quantum heterostructures, which possess novel quantum properties. Incorporating magnetism into such a structure at room temperature could enable direct control of electron spin polarization in the transistor geometry. We are working to combine 2D semiconductors and magnetic insulators as an early step toward creation of magnetic semiconductor heterostructures for spintronic devices. Along with proving the heterostructure concept, success in combining the two materials supports a subsequent goal, fabrication of a nanostructure consisting of a superconductor, semiconductor, and magnetic insulator. Achievement of these two goals will provide a fundamental building block for spintronics, address a vital materials challenge in the pathway to quantum computing, and potentially allow for integration of processing and storage technologies in a single device platform.
Quantum Sensing with Small Quantum Systems
Summary There are small quantum systems over which we have very good control and which have long lifetimes. Examples include the phosphorous (P) defect in silicon (Si) and the nitrogen vacancy (NV) defect in diamond. With P defect in Si, we focus on improving our understanding of the hyperpolarization mechanism to better enable engineering of […]
December 1, 2016
Development of Terahertz Polariton Lasers
Theoretical and experimental results show that the polariton lasing mechanism is a promising basis for a compact, efficient source of terahertz radiation.
July 1, 2017
Harnessing the Promise of Quantum Materials for Future Electronic Devices
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 […]
June 14, 2018