2005/08/31 by Martin Sigrist, M. Sigrist, T. Ihn +6 · 64 citations
Chemistry · Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Chemistry #Coherence (philosophical gambling strategy) #Condensed matter physics #Coupling (piping) #Materials science #Oscillation (cell signaling) #Phase (matter) #Phase coherence #Physics #Quantum and electron transport phenomena #Quantum mechanics #Quantum tunnelling #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.96.036804
published in Physical Review Letters 96(3), 036804 (American Physical Society) · 4 pages, 4 figures
arxiv created 2005/08/31 · openalex publication_date 2006/01/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Two quantum dots with tunable mutual tunnel coupling have been embedded in a two-terminal Aharonov-Bohm geometry. Aharonov-Bohm oscillations investigated in the cotunneling regime demonstrate coherent tunneling through nonresonant states. 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.