2007/11/28 by O. Zarchin, M. Zaffalon, Moty Heiblum +3 · 2 citations
Engineering · Mathematics · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Biasing #Charge (physics) #Condensed matter physics #Conductance #Electron #Kondo effect #Limit (mathematics) #Mathematics #Noise (video) #Physics #Quantum #Quantum and electron transport phenomena #Quantum dot #Quantum limit #Quantum mechanics #Semiconductor Quantum Structures and Devices #Unitary state #Voltage #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.77.241303
arxiv created 2007/11/28 · openalex publication_date 2008/06/03 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report on noise measurements in a quantum dot in the presence of Kondo correlations. Close to the unitary limit, with the conductance reaching 1.8e2∕h, we observed an average backscattered charge of e*\ensuremath∼5e∕3, while weakly biasing the quantum dot. This result held to bias voltages up to half the Kondo temperature. Away from the unitary limit, the charge was measured to be e as expected. These results confirm and extend theoretical predictions that suggested that two-electron backscattering processes dominate over single-electron backscattering processes near the unitary limit, with an average backscattered charge e*\ensuremath∼5e∕3.