Room-Temperature Ferromagnetism in Mn-Doped Semiconducting CdGeP2
The chalcopyrite CdGeP2 doped with Mn have been recently found to exhibit room-temperature ferromagnetism. Isovalent substitution of the Cd site is expected, however, to create antiferromagnetism, in analogy with the well-known CdTe:Mn (d5) case. However, chalcopyrite semiconductors exhibit low-energy intrinsic defects. We show theoretically how ferromagnetism results from the interaction of Mn with hole-producing intrinsic defects.
Physical Review Letters
- Pub Date:
- January 2002
- Condensed Matter - Strongly Correlated Electrons
- 4 pages, 4 figures. (To appear in Phys. Rev. Lett.)