6 papers
Entropy spectroscopy of a bilayer graphene quantum dot
Christoph Adam, Hadrien Duprez, Natalie Lehmann +13
We measure the entropy change of charge transitions in an electrostatically defined quantum dot in bilayer graphene. Entropy provides insights into the equilibrium thermodynamic pr…
Time-resolved Charge Detection in Transition Metal Dichalcogenide Quantum Dots
Markus Niese, Michele Masseroni, Clara Scherm +10
We investigate electronic transport through gate-defined quantum dots in molybdenum disulfide MoS using an integrated charge detector. We observe a crossover from two weakly co…
Microwave spectroscopy of few-carrier states in bilayer graphene quantum dots
Max J. Ruckriegel, Christoph Adam, Rebecca Bolt +8
Bilayer graphene is a maturing material platform for gate-defined quantum dots that hosts long-lived spin and valley states. Implementing solid-state qubits in bilayer graphene req…
Entropy of a double quantum dot
David Kealhofer, Christoph Adam, Max J. Ruckriegel +7
We use charge sensing to detect entropy changes in a double quantum dot defined by electrostatic gating of a GaAs/AlGaAs heterostructure. This system can be tuned to be two separat…
Spin-Valley Protected Kramers Pair in Bilayer Graphene
Artem O. Denisov, Veronika Reckova, Solenn Cances +11
The intrinsic valley degree of freedom makes bilayer graphene (BLG) a unique platform for semiconductor qubits. The single-carrier quantum dot (QD) ground state exhibits a two-fold…
Spin-valley locked excited states spectroscopy in a one-particle bilayer graphene quantum dot
Hadrien Duprez, Solenn Cances, Andraz Omahen +12
Current semiconductor qubits rely either on the spin or on the charge degree of freedom to encode quantum information. By contrast, in bilayer graphene the valley degree of freedom…