Current- and Field-Induced Topology in Twisted Nodal Superconductors

Pavel A. Volkov; Justin H. Wilson; Kevin P. Lucht; J. H. Pixley

doi:10.1103/PhysRevLett.130.186001

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Current- and Field-Induced Topology in Twisted Nodal Superconductors

Pavel A. Volkov, Justin H. Wilson, Kevin P. Lucht, J. H. Pixley

DOI 10.1103/PhysRevLett.130.186001 · Physical Review Letters

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Abstract

We show that interlayer current induces topological superconductivity in twisted bilayers of nodal superconductors. A bulk gap opens and achieves its maximum near a “magic” twist angle θMA. Chiral edge modes lead to a quantized thermal Hall effect at low temperatures. Furthermore, we show that an in-plane magnetic field creates a periodic lattice of topological domains with edge modes forming low-energy bands. We predict their signatures in scanning tunneling microscopy. Estimates for candidate materials indicate that twist angles θ∼θMA are optimal for observing the predicted effects.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown