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001025623 0247_ $$2ISSN$$a0163-1829
001025623 0247_ $$2ISSN$$a0556-2805
001025623 0247_ $$2ISSN$$a1095-3795
001025623 0247_ $$2ISSN$$a1098-0121
001025623 0247_ $$2ISSN$$a1538-4489
001025623 0247_ $$2ISSN$$a1550-235X
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001025623 0247_ $$2datacite_doi$$a10.34734/FZJ-2024-03012
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001025623 1001_ $$0P:(DE-HGF)0$$aMöller, Sören$$b0
001025623 245__ $$aImpact of competing energy scales on the shell-filling sequence in elliptic bilayer graphene quantum dots
001025623 260__ $$aWoodbury, NY$$bInst.$$c2023
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001025623 520__ $$aWe 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.
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001025623 536__ $$0G:(EU-Grant)820254$$a2D4QT - 2D Materials for Quantum Technology (820254)$$c820254$$fERC-2018-COG$$x2
001025623 536__ $$0G:(GEPRIS)390534769$$aDFG project 390534769 - EXC 2004: Materie und Licht für Quanteninformation (ML4Q) (390534769)$$c390534769$$x3
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001025623 7001_ $$0P:(DE-HGF)0$$aBanszerus, L.$$b1
001025623 7001_ $$0P:(DE-HGF)0$$aKnothe, A.$$b2
001025623 7001_ $$0P:(DE-HGF)0$$aValerius, L.$$b3
001025623 7001_ $$0P:(DE-HGF)0$$aHecker, K.$$b4
001025623 7001_ $$0P:(DE-HGF)0$$aIcking, E.$$b5
001025623 7001_ $$0P:(DE-HGF)0$$aWatanabe, K.$$b6
001025623 7001_ $$0P:(DE-HGF)0$$aTaniguchi, T.$$b7
001025623 7001_ $$0P:(DE-Juel1)187247$$aVolk, Christian$$b8
001025623 7001_ $$0P:(DE-Juel1)180322$$aStampfer, C.$$b9$$eCorresponding author
001025623 773__ $$0PERI:(DE-600)2844160-6$$a10.1103/PhysRevB.108.125128$$gVol. 108, no. 12, p. 125128$$n12$$p125128$$tPhysical review / B$$v108$$x2469-9950$$y2023
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