Quantum valley Hall effect in proximity-induced superconducting graphene: An experimental window for deconfined quantum criticality
Pouyan Ghaemi, Shinsei Ryu, Dung-Hai Lee
DOI 10.1103/PhysRevB.81.081403 · Physical Review B
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Abstract
We show that when superconductivity is induced in graphene through proximity effect, a superconducting vortex is dressed with an interesting pattern of textured order parameters. Furthermore, passing a supercurrent in a superconducting graphene sample induces accumulation of valley pseudospin quantum number at edges: the “quantum valley Hall effect” will be observable in superconducting graphene. These effects reveal a quantum duality between different order parameters that is at heart of the Wess-Zumino-Witten term.
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