Growth and magnetic properties of self-assembled (In, Mn)As quantum dots
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 1376-1378 |
Journal / Publication | Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures |
Volume | 23 |
Issue number | 4 |
Publication status | Published - 2005 |
Externally published | Yes |
Link(s)
Abstract
Self-assembled In0.79 Mn0.21 As quantum dots were successfully grown on GaAs (001) substrates by low-temperature molecular beam epitaxy. Atomic force microscopy and high-resolution transmission electron microscopy confirm the formation of quantum dots. High-resolution lattice image suggests that In0.79 Mn0.21 As dots are single phase with zinc-blend structure. The dots exhibit typical ferromagnetic state at 5 K and demonstrate a Curie temperature of ∼290 K which is much higher than those of (In, Mn)As diluted magnetic semiconductor alloys ever reported. The significant increase in Curie temperature can be attributed to the much higher Mn content in the dots, and the possible enhancement of the hybridization strength between the quantum-confined holes in the dots and the itinerant holes in the semiconductor valence band. © 2005 American Vacuum Society.
Citation Format(s)
Growth and magnetic properties of self-assembled (In, Mn)As quantum dots. / Chen, Y. F.; Lee, W. N.; Huang, J. H. et al.
In: Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures, Vol. 23, No. 4, 2005, p. 1376-1378.
In: Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures, Vol. 23, No. 4, 2005, p. 1376-1378.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review