C-SPIN IRG2, Oklahoma/Arkansas,
Download
1 / 1

C-SPIN IRG2, Oklahoma/Arkansas, DMR-0520550 - PowerPoint PPT Presentation


  • 54 Views
  • Uploaded on

C-SPIN IRG2, Oklahoma/Arkansas, DMR-0520550. (a). (b). Electron Spin Effects in Narrow Gap Semiconductors.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' C-SPIN IRG2, Oklahoma/Arkansas, DMR-0520550' - winthrop-conrad


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

C-SPIN IRG2, Oklahoma/Arkansas, DMR-0520550

(a)

(b)

Electron Spin Effects in Narrow Gap Semiconductors

Semiconductors with narrow energy gaps have properties that can be advantageous for devices that exploit electron spin. Electrons in InSb have a spin lifetime that is sufficiently long for the spin to be manipulated and/or detected. Coupling between electron spins and nuclear spins in InSb quantum wells was studied in quantum Hall ferromagnets (QHF) with domain structures. Dynamic nuclear polarization via the hyperfine interaction occurs when a large current flows through the QHF. Resistively-detected nuclear magnetic resonance (RDNMR) signals of both In and Sb are prominent.

(a) Electron spin relaxation rates in InSb as a function of electron kinetic energy. The purple (blue-green) lines indicate theoretical limits for the Elliot-Yafet (Dyakanov-Perel) process.

(b) Quadrupole splittings of 115In measured by the RDNMR technique applied to an InSb quantum well. The gray line is a fit with nine Gaussian curves (black line).


ad