Unlike classic spins, quantum magnets are spin systems that interact via the exchange
interaction and exhibit collective quantum behaviours, such as fractional excitations …

Breaking a correlated pair in a superconductor requires an even number of fermions
providing at least twice the pairing energy Δ. Here, we show that a single tunneling electron …

Theoretical descriptions of Yu-Shiba-Rusinov (YSR) states induced by magnetic impurities
inside the gap of a superconductor typically rely on a classical spin model or are restricted to …

Large ordered islands of aluminum phthalocyanine (AlPc) molecules, which are unstable in
air, are synthesized from ClAlPc on Pb (100) via dechlorination. Low-temperature scanning …

Magnetic adatoms on a superconducting substrate undergo a quantum phase transition as
their exchange coupling to the conduction electrons increases. For quantum spins, this …

Understanding the interplay between individual magnetic impurities and superconductivity is
crucial for bottom-up construction of novel phases of matter. Sub-gap bound states that are …

Spin-flip excitations of iron porphyrin molecules on Au (111) are investigated with a low-
temperature scanning tunneling microscope. The molecules adopt two distinct adsorption …

Magnetic adatoms on s-wave superconductors induce bound states inside the
superconducting gap, called Yu-Shiba-Rusinov (YSR) states. The anisotropy of the Fermi …

Molecular vibrational spectroscopy with the scanning tunneling microscope is feasible but
usually detects few vibrational modes. We harness sharp Yu-Shiba-Rusinov states observed …

Molecular spins on surfaces potentially used in quantum information processing and data
storage require long spin excitation lifetimes. Normally, coupling of the molecular spin with …