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@ARTICLE{Mller:1025623,
author = {Möller, Sören and Banszerus, L. and Knothe, A. and
Valerius, L. and Hecker, K. and Icking, E. and Watanabe, K.
and Taniguchi, T. and Volk, Christian and Stampfer, C.},
title = {{I}mpact of competing energy scales on the shell-filling
sequence in elliptic bilayer graphene quantum dots},
journal = {Physical review / B},
volume = {108},
number = {12},
issn = {2469-9950},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {FZJ-2024-03012},
pages = {125128},
year = {2023},
abstract = {We report on a detailed investigation of the shell-filling
sequence in electrostatically defined elliptic bilayer
graphene quantum dots (QDs) in the regime of low charge
carrier occupation, N≤12, by means of magnetotransport
spectroscopy and numerical calculations. We show the
necessity of including both short-range electron-electron
interaction and wave-function-dependent valley g-factors for
understanding the overall fourfold shell-filling sequence.
These factors lead to an additional energy splitting at half
filling of each orbital state and different energy shifts in
out-of-plane magnetic fields. Analysis of 31 different
bilayer graphene (BLG) QDs reveals that both valley g-factor
and electron-electron interaction-induced energy splitting
increase with decreasing QD size, validating theory.
However, we find that the electrostatic charging energy of
such gate-defined QDs does not correlate consistently with
their size, indicating complex electrostatics. These
findings offer significant insights for future BLG QD
devices and circuit designs.},
cin = {PGI-9},
ddc = {530},
cid = {I:(DE-Juel1)PGI-9-20110106},
pnm = {5222 - Exploratory Qubits (POF4-522) / GrapheneCore3 -
Graphene Flagship Core Project 3 (881603) / 2D4QT - 2D
Materials for Quantum Technology (820254) / DFG project
390534769 - EXC 2004: Materie und Licht für
Quanteninformation (ML4Q) (390534769)},
pid = {G:(DE-HGF)POF4-5222 / G:(EU-Grant)881603 /
G:(EU-Grant)820254 / G:(GEPRIS)390534769},
typ = {PUB:(DE-HGF)16},
doi = {10.1103/PhysRevB.108.125128},
url = {https://juser.fz-juelich.de/record/1025623},
}