Mn-doped II-VI quantum dots: artificial molecular magnets

Details Mn-doped II-VI quantum dots: artificial molecular magnets Mn-doped II-VI quantum dots: artificial molecular magnets

2007-02-06

arxiv.org/abs/cond-mat/0702139v1

Phys. Stat. Sol. (c) 3, 3734 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Conference article presented at QD2006, Chamonix, May 2006

Scientific paper

10.1002/pssc.200671504

The notion of artifical atom relies on the capability to change the number of carriers one by one in semiconductor quantum dots, and the resulting changes in their electronic structure. Organic molecules with transition metal atoms that have a net magnetic moment and display hysteretic behaviour are known as single molecule magnets (SMM). The fabrication of CdTe quantum dots chemically doped with a controlled number of Mn atoms and with a number of carriers controlled either electrically or optically paves the way towards a new concept in nanomagnetism: the artificial single molecule magnet. Here we study the magnetic properties of a Mn-doped CdTe quantum dot for different charge states and show to what extent they behave like a single molecule magnet.

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