The search for topological phases of matter is evolving towards strongly interacting systems,
including magnets and superconductors, where exotic effects emerge from the quantum …

Advances in high-resolution and spin-resolved scanning tunnelling microscopy, as well as
atomic-scale manipulation, have enabled the bottom-up, atom-by-atom creation and …

Condensed-matter systems provide a rich setting to realize Dirac and Majorana fermionic
excitations as well as the possibility to manipulate them for potential applications,. It has …

Ordered assemblies of magnetic atoms on the surface of conventional superconductors can
be used to engineer topological superconducting phases and realize Majorana fermion …

Nematic quantum fluids with wave functions that break the underlying crystalline symmetry
can form in interacting electronic systems. We examined the quantum Hall states that arise …

Novel many-body and topological electronic phases can be created in assemblies of
interacting spins coupled to a superconductor, such as one-dimensional topological …

High quality hexagon plate-like Na 3 Bi crystals with large (001) plane surfaces were grown
from a molten Na flux. The freshly cleaved crystals were analyzed by low temperature …

Cooling the junction of a scanning tunneling microscope to millikelvin temperatures is
fundamental for high-resolution scanning tunneling spectroscopy. However, accurately …

The Josephson effect provides a direct method to probe the strength of the pairing
interaction in superconductors. By measuring the phase fluctuating Josephson current …

We describe the development and performance of an ultra-high vacuum scanning tunneling
microscope working under combined extreme conditions of ultra-low temperatures and high …