A three-dimensional model for artificial atoms and molecules: Influence of substrate orientation and magnetic field dependence

Physics – Condensed Matter – Materials Science

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Scientific paper

A full three-dimensional model for the calculation of the electronic structure of semiconductor quantum dots (QD) and molecules (QDM) grown on high index surfaces and/or in the presence of an external magnetic field is presented. The strain distribution of the dots is calculated using continuum elasticity and singe-particle states are extracted from the nonsymmetrized eight-band k.p theory. The model properly takes into account the effects of different substrate orientation by rotation of the coordinate system in the way that one coordinate coincides with the growth direction, whereas the effects of a tilted external magnetic field are taken into account throught the Zeeman effect and employing a gauge invariant scheme based on Wilson's formulation of lattice gauge theory. We point out the role of piezoelectricity for InAs/GaAs QDs grown on [11k], where k = 1,2,3,4,5,7,9 and for QDMs containing eight InAs/GaAs QDs grown on [11l], where l = 1,2,3. We predict the variation of the transition energies of the QDM as a function of substrate orientation and interdot distances in the molecule. We address the magnetic field direction dependent variation of the electronic properties of QD and QDM.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

A three-dimensional model for artificial atoms and molecules: Influence of substrate orientation and magnetic field dependence does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A three-dimensional model for artificial atoms and molecules: Influence of substrate orientation and magnetic field dependence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A three-dimensional model for artificial atoms and molecules: Influence of substrate orientation and magnetic field dependence will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-372456

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.