Bulletin of the American Physical Society
APS March Meeting 2010
Volume 55, Number 2
Monday–Friday, March 15–19, 2010; Portland, Oregon
Session A25: Focus Session: Dopants and Defects in Semiconductors - ZnO
8:00 AM–11:00 AM,
Monday, March 15, 2010
Sponsoring Unit: DMP
Chair: Mike Stavola, Lehigh University
Abstract ID: BAPS.2010.MAR.A25.11
Abstract: A25.00011 : Size-dependent induced magnetism in carbon-doped ZnO nanostructures*
10:24 AM–10:36 AM
Preview Abstract Abstract
(Washington State University)
(University of Texas)
The role of quantum confinement on the carbon doped ZnO nanocrystals will be examined using a real-space, first-principles method. We find that the spin polarization energy of carbon defects in nanocrystals is sensitive to size owing to the partial occupancy of a less-localized minority spin state. In addition, we find that the partial occupancy of a minority spin state results in a direct exchange mechanism between the carbon defects even under strong confinement. The analysis suggests that the semiconductor with non-magnetically induced magnetic moments should provide a significant advantage over the traditional dilute magnetic semiconductors when applied to nanometer-scaled applications.
*The work was supported by the U. S. Department of Energy under DE-FG02-06ER15760. Computational resources were provided by the National Energy Research Scientific Computing Center and the Texas Advanced Computing Center.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.MAR.A25.11
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
1 Physics Ellipse, College Park, MD 20740-3844
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700