Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session D11: Non-Carbon Based Nanostructures
3:00 PM–5:48 PM,
Monday, March 4, 2024
Room: M100B
Sponsoring
Unit:
DCMP
Chair: Pengpeng Zhang, Michigan State University
Abstract: D11.00007 : Superconductor-semiconductor hybrid capacitance with a nonlinear charge-voltage profile*
4:12 PM–4:24 PM
Presenter:
Joachim Lauwens
(Katholieke Univ Leuven, IMEC)
Authors:
Joachim Lauwens
(Katholieke Univ Leuven, IMEC)
Bart Soree
(IMEC)
Arnau Sala
(IMEC)
Lars Kerkhofs
(IMEC)
The device consists of a nanowire placed between the metallic plates of a coplanar capacitor, with a co-parallel alignment. At low temperatures, due to the finite density of states on the nanowire, the charge distribution in the capacitor is uneven and energy-dependent, resulting in a charge-dependent effective capacitance between the metallic plates.
We study this system analytically and numerically, identify working regimes, and show that the nonlinearity of the capacitance can be significant enough to be utilized in circuit quantum electrodynamics. The resulting nonlinearity can be switched on, modulated, and switched off by an external potential, thus making this capacitive device highly versatile for uses in quantum computation.
[1] 2021 J. Phys.: Condens. Matter 33 28LT01
*This work was supported by imec's Industrial Affiliation Program.
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