When a Gevrey smooth perturbation is applied to a quasi-convex integrable Hamiltonian, it is known that the KAM invariant tori that survive are "sticky", i.e. doubly exponentially stable. We show by examples the optimality of this effective stability.
Published in Nature Communications
One-dimensional topological superconductors are predicted to host zero-energy Majorana fermions at their extremities. Here, the authors observe dispersive edge states in a monolayer of Pb/Si(111) coupled to a ferromagnetic domain.
Published in Plasma Chemistry and Plasma Processing
To assist the development of plasma processes to pattern graphene in a controlled way, interactions between hydrogen plasma species (H, H+, H2+) and various types of graphene surfaces (monolayer, nanoribbons, multilayer) are investigated using atomic-scale simulations. It is shown that only “hot” H particles (i.e., with a kinetic energy greater tha...
