Skip to content
6CCVD Research

How carbon vacancies can affect the properties of group IV color centers in diamond - A study of thermodynamics and kinetics

At a Glance

Section titled “At a Glance”
MetadataDetails
Publication Date2019-11-18
JournalJournal of Applied Physics
AuthorsRodrick Kuate Defo, Efthimios Kaxiras, Steven L. Richardson
InstitutionsHoward University, Harvard University
Citations17

Abstract

Section titled “Abstract”

Recently, there has been much interest in using Group IV elements from the periodic table to fabricate and study XV color centers in diamond, where X=Si, Ge, Sn, or Pb and V is a carbon vacancy. These Group IV color centers have a number of interesting spin and optical properties, which could potentially make them better candidates than NV− centers for important applications in quantum computing and quantum information processing. Unfortunately, the very same ion implantation process that is required to create these XV color centers in diamond necessarily also produces many carbon vacancies (VC), which can form complexes with these color centers (VC−XV) that can dramatically affect the properties of the isolated XV color centers. The main focus of this work is to use density-functional theory to study the thermodynamics and kinetics of the formation of these VC−XV complexes and to suggest experimental ways to impede this process such as varying the Fermi level of the host diamond material through chemical doping or applying an external electrical bias. We also include a discussion of how the simple presence of many VC can negatively impact the spin coherence times (T2) of Group IV color centers through the presence of acoustic phonons.

Tech Support

Section titled “Tech Support”

Original Source

Section titled “Original Source”

References

Section titled “References”
  1. 2013 - The nitrogen-vacancy colour centre in diamond [Crossref]
  2. 2014 - Formation of NV centers in diamond: A theoretical study based on calculated transitions and migration of nitrogen and vacancy related defects [Crossref]
  3. 2009 - Theory of spin-conserving excitation of the N−V− center in diamond [Crossref]
  4. 2018 - Quantum technologies with optically interfaced solid-state spins [Crossref]
  5. 2019 - Parallel BFS implementing optimized decomposition of space and kMC simulations for diffusion of vacancies for quantum storage [Crossref]
  6. 2018 - Energetics and kinetics of vacancy defects in 4H-SiC [Crossref]
  7. 2013 - Solid-state electronic spin coherence time approaching one second [Crossref]
  8. 2009 - Ultralong spin coherence time in isotopically engineered diamond [Crossref]
  9. 2018 - One-second coherence for a single electron spin coupled to a multi-qubit nuclear-spin environment [Crossref]
  10. 2001 - Spectroscopy of single N-V centers in diamond [Crossref]

Reads Similar to This

Giant shift upon strain on the fluorescence spectrum of VNNB color centers in h-BN Thermally tunable add-drop filter based on valley photonic crystals for optical communications Surface Planarization with Gas Cluster Ion Beams and Application to Wide-Bandgap Semiconductors