Open AccessBonding-antibonding ground state transition in coupled quantum dots
Author(s) -
Tang Nai-Yun
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.057301
Subject(s) - antibonding molecular orbital , ground state , physics , diatomic molecule , atomic orbital , molecular physics , atomic physics , condensed matter physics , molecule , quantum mechanics , electron
The two lowest single-particle hole states in two vertically coupled quntum dots (CQDs) are investigated by using the six-band KP model. A bonding-antibonding ground-state transition is observed with interdot distance increasing. This result is counterintuitive, for the antibonding molecular ground state has never been observed in natural diatomic molecules. By comparing the wavafunction component of hole, we verify that the reordering of bonding and antibonding orbitals with interdot distance increasing is caused by spin-orbit interaction of holes.