Phase coherence in the inelastic cotunneling regime

Details Phase coherence in the inelastic cotunneling regime Phase coherence in the inelastic cotunneling regime

2005-08-31

arxiv.org/abs/cond-mat/0508757v1

Phys. Rev. Lett. 96, 036804 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.96.036804

Two quantum dots with tunable mutual tunnel coupling have been embedded in a two-terminal Aharonov-Bohm geometry. Aharonov-Bohm oscillations are investigated in the cotunneling regime. Visibilities of more than 0.8 are measured indicating that phase-coherent processes are involved in the elastic and inelastic cotunneling. An oscillation-phase change of pi is detected as a function of bias voltage at the inelastic cotunneling onset.

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