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Graphene-Superconductor Hybrids: towards graphene-based topological computing devices
November 30, 20184:00 pm – 5:00 pm (CDT)

Graphene-Superconductor Hybrids: towards graphene-based topological computing devices


Ivan Borzenets (City University of Hong Kong)


Ar. Abanov



Mitchell Institute for Fundamental Physics & Astronomy

College Station, Texas 77843

Event Details

The current push towards topological computing specifically and scalable quantum computing in general has put great pressure towards the study of low dimensional nano-materials coupled with superconductors. Such hybrid systems are predicted to support novel topological quantum states such as: Majorana and Parafermions. While the phase-space of low dimensional nanomaterials is vast, graphene (a single layer of crystalline carbon) remains as the flagship material to this day. Here, we discuss the physics of graphene coupled to a superconducting material in the ballistic (ultra-clean) regime as well as the diffusive (dirty) regime. We discuss the governing parameters of such devices and comment on the apparent discrepancies with current theories. Moving beyond the conventional Josephson junction format, we look at more complicated supercurrent flow. Namely, the coexistence of normal and super-currents in the same physical space, and the observation of supercurrent in the Quantum Hall regime. Finally, future potential work is briefly discussed.

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