Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session A74: Spin Qubit Arrays I
8:00 AM–11:00 AM,
Monday, March 6, 2023
Room: Room 403/404
Sponsoring
Unit:
DQI
Chair: Andre Saraiva, Diraq
Abstract: A74.00011 : Spin Filling in a Silicon Quantum Dot Array
10:24 AM–10:36 AM
Presenter:
Fan Fei
(University of Maryland, College Park)
Authors:
Fan Fei
(University of Maryland, College Park)
Xiqiao Wang
(University of Maryland, College Park)
Ehsan Khatami
(SJSU)
Jonathan Wyrick
(National Institute of Standards and Tech)
Pradeep N Namboodiri
(NIST)
Joseph B Fox
(University of Maryland, College Park)
Albert F Rigosi
(NIST)
Richard M Silver
(NIST)
In this talk, we show STM-fabrication of a strongly tunnel-coupled 3x3 dot array in which electrons are fully delocalized across the sites. Each electron added to the array is indicated by a well-defined Coulomb peak. We extract the magnetic field dependence of the electron chemical potential and electron addition energy from which we determine the “Hund’s rule” for electron filling for an array. Using an extended Hubbard model, we simulate the spin/charge occupation, the spatial distribution of the many-body states and the electron addition energy spectrum.
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