Online Simulation

And More

Top 25 Tags (all tags)

  1. algorithms
  2. aqme
  3. carbon nanotubes
  4. course lecture
  5. cyberinfrastructure
  6. devices
  7. education/outreach
  8. experiments
  9. material science
  10. molecular electronics
  11. nano/bio
  12. nanobio applications
  13. nano electro-mechanical systems
  14. nanoelectronics
  15. nanomedicine
  16. nanophotonics
  17. nano-transistors
  18. nanowires
  19. NEGF
  20. quantum dots
  21. quantum transport
  22. research seminar
  23. transistors
  24. tutorial
  25. uIllinois

Other

Trouble Report

For immediate assistance browse through our support center. You can find answers to many questions in just a few minutes.

If still experiencing problems, send us a report.

Sending report ...

Spin Coupled Quantum Dots

This resource has a 5.2 Ranking

Ranking is calculated from a formula comprised of user reviews and usage statistics. Learn more ›

Usage Stats
Overall Period: Updated 21 Nov, 2008
Users: 16
Jobs: 81
Avg. exec. time: 45 secs
Reviews & Citations
Google/IEEE
Avg. Review: 0.0 out of 5 stars
Citations: 0

16 users, detailed statistics

0 reviews (Review this)

0 citations

0 questions (Ask a question)

Launch Tool

You must log in before you can run this tool.

Open Source (OSI) LogoThis tool is open source, according to this license.

Download version 1.0

Available Versions

  • 1.0 (published)

Supporting Documents

Version 1.0 - published on 05 Aug, 2008
Contributor(s) John Shumway
Arizona State University

Matthew Gilbert
University of Texas at Austin
At a glance Path integral calculation of exchange coupling of spins in neighboring quantum dots.
Description This tool illustrates the calculation of spin coupling in neighboring quantum dots. The theory behind this calculation is described in “Path integral study of the role of correlation in exchange coupling in quantum dots and optical lattices,” by Lei Zhang, M. J. Gilbert, and J. Shumway (submitted, 2008). The model is a double parabolic quantum dot, and the user may adjust several parameters, including:
  • The dot separation distance.
  • The electron effective mass.
  • The dielectric constant.
The simulation typically runs for about one minute and solves the interacting two-electron problem to give results that include:
  • The interacting charge density in cm-2.
  • The spin coupling J in meV.
  • The correlation hole when one electron is passing between the dots.
The simulation is driven by the same research code “pi” that drives the simulations in our research paper, but the length of the nanoHUB runs is much shorter. The user has the option of downloading the pimc.xml input file to run the simulations locally and explore simulation convergence. Note: To get precise answers, the simulations must be converged with respect to time step (Trotter number) and sampled thoroughly. Also, the temperature must be low enough to suppress contributions from double occupation of dots. The results and errorbars nanoHUB are a rough guide to the value of the exchange splittings and serve to illustrate this path integral method. You may contact john.shumway@asu.edu for expert advise if you intend to use these results in research applications.
Powered by

“pi”: our group’s open-source path integral Monte Carlo program.

The full path integral simulation tool available as app-pimc on nanoHUB.

Credits

Developed by John Shumway in the Department of Physics at Arizona State University.

Sponsored by

Work supported by NSF Grant No. DMR 0239819 and NRI-SWAN.

References
  • “Path integral study of the role of correlation in exchange coupling in quantum dots and optical lattices,” by Lei Zhang, M. J. Gilbert, and J. Shumway (submitted, 2008).
  • Double dot model is from: J. Pedersen, C. Flindt, N. A. Mortensen, and A.-P. Jauho, Phys. Rev. B 76, 125323 (2007).
Cite this work

If you reference this work in a publication, please cite as follows:

  • Shumway, John; Gilbert, Matthew (2008), "Spin Coupled Quantum Dots," doi: 10254/nanohub-r4963.1.

    BibTex | EndNote

In addition, we would appreciate it if you would add the following acknowledgment to your publication:

  • Simulation services for results presented here were provided by the Network for Computational Nanotechnology (NCN) at nanoHUB.org
Type Tools
Tags

Citations

The following are publications that have cited this resource, separated by their affiliation to the NCN.

No citations found.

Reviews

The following are reviews of this resource from other site members.

Write a review

No reviews found. Be the first to review this resource!

Related Questions & Answers

The following are questions related to this tool that were posted by other users in our questions and answers forum.

Ask a question about this tool

No questions found.

People who looked at this also looked at:

Network Recommendations powered by CIKNOW developed by the Science of Networks in Communities Research (SONIC) group at Northwestern University.

Recommendations will load momentarily. If you do not see content change after 30 seconds, there may be a number of reasons:

  • You have javascript turned off in your browser.
  • You have browser incapable of handling the scripts that load the recommendations.
  • There is a problem with the recommendation service and it failed to respond.