Spontaneous vortex-antivortex lattice and Majorana fermions in rhombohedral graphene
Filippo Gaggioli, Daniele Guerci, Liang Fu
公開日: 2025/3/20
Abstract
The discovery of superconducting states in multilayer rhombohedral graphene with spin and valley polarization has raised an interesting question: how does superconductivity cope with time-reversal symmetry breaking? In this work, using Ginzburg-Landau theory and microscopic calculation, we predict the existence of a new superconducting state at low electron density, which exhibits a spontaneously formed lattice of vortices and antivortices hosting Majorana zero-modes in their cores. We further identify this vortex-antivortex lattice (VAL) state in the experimental phase diagram and describe its experimental manifestations.