Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

¹³C NMR: ¹H–¹³C Decoupling01:04

¹³C NMR: ¹H–¹³C Decoupling

The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
Atomic Nuclei: Nuclear Spin01:08

Atomic Nuclei: Nuclear Spin

All atomic particles possess an intrinsic angular momentum, or 'spin'. Electrons, protons, and neutrons each have a spin value of ½, although protons and neutrons in nuclei may have higher half-integer spins owing to energetic factors.
Atomic nuclei have a net nuclear spin, , which can have an integer or half-integer value. In atomic nuclei, the spins of protons are paired against each other but not with neutrons, and vice versa. Consequently, an even number of protons does not contribute to...
Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Nuclear Overhauser Enhancement (NOE)01:06

Nuclear Overhauser Enhancement (NOE)

Irradiation of a spin-active nucleus causes an increase or decrease in the signal intensity of neighboring nuclei that are not necessarily chemically bonded or involved in J-coupling. This phenomenon, called the nuclear Overhauser enhancement (NOE), results from through-space interactions between the nuclear spins. The NOE effect decreases with increasing internuclear distance and is generally not observed beyond 4 angstroms. In NOE, dipole-dipole interactions between neighboring spin-active...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Coupling a ^{73}Ge Nuclear Spin to an Electrostatically Defined Quantum Dot in Silicon.

Physical review letters·2026
Same author

Scalable Quantum Current Source on Commercial CMOS Process Technology.

Nano letters·2026
Same author

Impact of the local valley splitting on the coherence of conveyor-belt spin shuttling in <sup>28</sup>Si/SiGe.

Nature communications·2026
Same author

Assessment of intracellular complexity of monocyte through cell population data (CPD) can lead to early recognition of bloodstream infections.

Archives of microbiology·2026
Same author

Early diagnosis of bloodstream infections by Neutrophil-Reactive Intensity (NEUT-RI): a retrospective analysis.

European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology·2025
Same author

Homocysteine in the Cardiovascular Setting: What to Know, What to Do, and What Not to Do.

Journal of cardiovascular development and disease·2025

Related Experiment Video

Updated: Jun 5, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
11:33

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

Electron spin decoherence in isotope-enriched silicon.

Wayne M Witzel1, Malcolm S Carroll, Andrea Morello

  • 1Sandia National Laboratories, Albuquerque, New Mexico 87185, USA. wwitzel@sandia.gov

Physical Review Letters
|January 15, 2011
PubMed
Summary
This summary is machine-generated.

Isotope-enriched silicon shows promise for quantum computing, but background electron spins from phosphorus impurities cause significant spin decoherence. This study identifies these background dopants as the primary decoherence mechanism, crucial for advancing silicon quantum technologies.

More Related Videos

Using Neutron Spin Echo Resolved Grazing Incidence Scattering to Investigate Organic Solar Cell Materials
06:05

Using Neutron Spin Echo Resolved Grazing Incidence Scattering to Investigate Organic Solar Cell Materials

Published on: January 15, 2014

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

Related Experiment Videos

Last Updated: Jun 5, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
11:33

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

Using Neutron Spin Echo Resolved Grazing Incidence Scattering to Investigate Organic Solar Cell Materials
06:05

Using Neutron Spin Echo Resolved Grazing Incidence Scattering to Investigate Organic Solar Cell Materials

Published on: January 15, 2014

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

Area of Science:

  • Quantum computing
  • Materials science
  • Condensed matter physics

Background:

  • Silicon is a promising material for spin-based quantum computation.
  • Isotopic enrichment can eliminate nuclear spins, a source of magnetic noise.
  • Existing decoherence times in enriched silicon fall short of theoretical limits.

Purpose of the Study:

  • To investigate the effect of background electron spins on spin decoherence in silicon.
  • To determine the role of residual phosphorus impurities as a decoherence mechanism.
  • To understand decoherence as a function of donor concentration, silicon-29 concentration, and temperature.

Main Methods:

  • Utilized cluster expansion techniques tailored for sparse, dipolarly coupled electron spin baths.
  • Studied spin decoherence decay rates.
  • Analyzed the influence of varying donor and silicon-29 concentrations and temperature.

Main Results:

  • Established the significant contribution of background electron spins to decoherence.
  • Demonstrated agreement between theoretical results and experimental spin echo data in silicon:phosphorus (Si:P).
  • Identified background dopants as the limiting decoherence mechanism in isotope-enriched silicon.

Conclusions:

  • Background electron spins from residual phosphorus impurities are a critical factor in spin decoherence in silicon.
  • Understanding and mitigating this dopant-induced decoherence is essential for achieving long coherence times in silicon quantum computers.
  • Further research should focus on minimizing background dopants to enhance quantum computational performance.