Aharonov-Bohm oscillations changed by indirect interdot tunneling via electrodes in parallel-coupled vertical double quantum Dots

T. Hatano, T. Kubo, Y. Tokura, S. Amaha, S. Teraoka, S. Tarucha

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39 Citations (Scopus)

Abstract

Aharonov-Bohm (AB) oscillations are studied for a parallel-coupled vertical double quantum dot with a common source and drain electrode. We observe AB oscillations of current via a one-electron bonding state as the ground state and an antibonding state as the excited state. As the center gate voltage becomes more negative, the oscillation period is clearly halved for both the bonding and antibonding states, and the phase changes by half a period for the antibonding state. This result can be explained by a calculation that takes account of the indirect interdot coupling via the two electrodes.

Original languageEnglish
Article number076801
JournalPhysical Review Letters
Volume106
Issue number7
DOIs
Publication statusPublished - 2011 Feb 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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