Support Options

Submit a Support Ticket


Engineered Defects in Wide Band-gap Semiconductors for Single-spin Sensing and Computation

By Abram Falk

Institute for Molecular Engineering, University of Chicago, Chicago, IL

Published on


While generally considered undesirable in traditional electronic devices, semiconductor defects can confine isolated electronic spins and act as nanoscale, single-spin memory registers. Alongside research efforts focusing on nitrogen-vacancy centers in diamond, an alternative approach seeks to identify and control new spin systems in new materials, a strategy that could ultimately lead to “designer” spins with tailored properties for future quantum photonics and nanoscale sensing applications. Using infrared light at near-telecom wavelengths, I will show that spin states in silicon carbide exhibit long quantum coherence times that persist up to room temperature. I will also discuss new strategies for generating coherent spin interactions at the nanoscale using defects in inequivalent lattice sites (Fig. 1), as well as resonant electric and strain fields. Together with the availability of industrial scale crystal growth and advanced microfabrication, wide-gap semiconductors are promising platforms for room-temperature quantum technologies that merge spin degrees of freedom with electronics and photonics.

Interacting spin states based on inequivalent defects in SiC
Fig. 1. Interacting spin states based on inequivalent defects in SiC

Sponsored by



Birck Technology Center, Room 1001, Purdue University, West Lafayette, IN, a resource for nanoscience and nanotechnology, is supported by the National Science Foundation and other funding agencies. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.