Internally engineered Majorana modes in twisted bilayer graphene

PIRSA ID: 21090017
Series: Quantum Matter
Event Type: Seminar
Scientific Area(s):
Quantum Matter
End date:
  • Jason Alicea, California Institute of Technology (Caltech) - Physics Graduate Office

Twisted bilayer graphene (TBG) realizes an exquisitely tunable, strongly interacting system featuring superconductivity and various correlated insulating states. In this talk I will introduce gate-defined wires in TBG as an enticing platform for Majorana-based fault-tolerant qubits. Our proposal notably relies on “internally” generated superconductivity in TBG – as opposed to “external” superconducting proximity effects commonly employed in Majorana devices – and may operate even at zero magnetic field. I will also describe how electrical measurements of gate-defined wires can reveal the nature of correlated insulators and shed light on the Cooper-pairing mechanism in TBG.

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