Paramagnetism of interacting few-electron quantum dot with single magnetic impurity

Shun-Jen Cheng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We present theoretical results on the effects of particle-particle interaction and single spin- frac(5, 2) magnetic impurity ( Mn2 +) on the paramagnetism of interacting spherical quantum dots(QDs). Within the effective mass approximation, the energy spectrum, magnetization, and magnetic susceptibility of the semi-magnetic QDs with electron number Ne = 1 - 4 are calculated by using the configuration interaction method. It is found that the sp-d coupling between carrier and Mn2 + magnetic ion gives rise to suppression or enhancement of paramagnetism, sensitively depending on electron number and the location of ion. The magnetic properties of the dot with Ne = 3, 4 exhibit pronounced anisotropy due to the anti-symmetry character of the p-shell wave functions coupled to magnetic ion.

Original languageEnglish
Pages (from-to)407-411
Number of pages5
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume32
Issue number1-2 SPEC. ISS.
DOIs
StatePublished - 1 May 2006

Keywords

  • Diluted magnetic quantum dots
  • Paramagnetism
  • Semi-magnetic quantum dot

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