Branch current behavior at two level anti-crossings in vertical quantum dot single-particle spectra

We study single\u2010electron\u2010elastic\u2010resonant\u2010tunneling through two weakly coupled vertical quantum dots and investigate the branch current behavior at anti\u2010crossings between two single\u2010particle energy levels in the constituent dot spectra that are induced to approach each other by application of an out\u2010of\u2010dot\u2010plane magnetic field. We observe both the familiar case of monotonic transfer of the resonant current strengths between the two branches as well as the less familiar case of concurrent enhancement and suppression (ideally complete cancellation) of the resonant current in the two branches. These two situations can be explained in terms of a simple coherent tunneling model.Peer reviewed: YesNRC publication: Ye