Tuning the tunnel coupling of quantum dot molecules with longitudinal magnetic fields
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comunitat-uji-handle2:10234/7013
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Title
Tuning the tunnel coupling of quantum dot molecules with longitudinal magnetic fieldsAuthor (s)
Date
2008Publisher
American Institute of PhysicsISSN
0003-6951Type
info:eu-repo/semantics/articleVersion
info:eu-repo/semantics/publishedVersionAbstract
We show that the energy splitting between the bonding and antibonding molecular states of holes in vertically stacked quantum dots can be tuned using longitudinal magnetic fields. With increasing field, the energy ... [+]
We show that the energy splitting between the bonding and antibonding molecular states of holes in vertically stacked quantum dots can be tuned using longitudinal magnetic fields. With increasing field, the energy splitting first decreases to zero and then to negative values, which implies a bonding-to-antibonding ground state transition. This effect is a consequence of the enhancement of the valence band spin-orbit interaction induced by the magnetic field; it provides a flexible mechanism to switch the molecular ground state from bonding to ntibonding. [-]
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© 2008 American Institute of Physics
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