Details

Autor(en) / Beteiligte

• Doty, M F
• Climente, J I
• Korkusinski, M
• Scheibner, M
• Bracker, A S
• Hawrylak, P
• Gammon, D

Titel

Antibonding ground states in InAs quantum-dot molecules

Ist Teil von

• Physical review letters, 2009-01, Vol.102 (4), p.047401-047401, Article 047401

Ort / Verlag

United States

Erscheinungsjahr

2009

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• Coherent tunneling between two InAs quantum dots forms delocalized molecular states. Using magnetophotoluminescence spectroscopy we show that when holes tunnel through a thin barrier, the lowest energy molecular state has bonding orbital character. However, as the thickness of the barrier increases, the molecular ground state changes character from a bonding orbital to an antibonding orbital, confirming recent theoretical predictions. We explain how the spin-orbit interaction causes this counterintuitive reversal by using a four-band k.p model and atomistic calculations that account for strain.