Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-12-20
Physical Review Letters 106, 076801 (2011)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages main text + 6 pages supplementary material
Scientific paper
10.1103/PhysRevLett.106.076801
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 anti-bonding 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.
Amaha S.
Hatano Takafumi
Kubo Takayuki
Tarucha Seigo
Teraoka S.
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