Non-universal transmission phase behaviour of a large quantum dot

• DOI: 10.1038/s41467-017-01685-z
• Publication Date: 2017-11-16T21:59:42Z
• Authors: Hermann Edlbauer; Shintaro Takada; Grégoire Roussely; Michihisa Yamamoto; Seigo Tarucha; Arne Ludwig; Andreas D. Wieck; Tristan Meunier; Christopher Bäuerle
• Keywords: Coulomb blockade

The electron wave function experiences a phase modification at coherent transmission through quantum dot. This undergoes characteristic shift of $\pi$ when scanning Coulomb-blockade resonance. Between successive resonances either lapse or plateau is theoretically expected to occur depending on the parity corresponding dot states. Despite considerable experimental effort, this behaviour has remained elusive for large Here we report measurements across such hosting hundreds electrons. Using an original two-path interferometer scan along fourteen resonances, observe both lapses and plateaus. Additionally, demonstrate that deformation alters sequence plateaus via modifications involved Our findings set milestone towards comprehensive understanding dots.