Dataset for publication "Quantifying the quantum nature of high-spin YSR excitations in transverse magnetic field" (2024)

Abstract

This is a raw data collection for the respective Science Advances publication by van Mullekom et al. (10.1126/sciadv.adq0965).Here, one can find the experimental and simulated raw data in ASCII format to replot the figures shown in the publication.Excitations of individual and coupled spins on superconductors provide a platform to study quantum spin impurity models as well as a pathway toward realizing topological quantum computing. Here, we characterize, using ultralowtemperature scanning tunneling microscopy/spectroscopy, the Yu-Shiba-Rusinov(YSR) states of individual manganese phthalocyanine molecules with high spin on an ultrathin lead film in variable transverse magnetic field. We observe two types of YSR excitations, depending on the adsorption geometry. Using a zero-bandwidth model, we detail the role of the magnetic anisotropy, spin-spinexchange, and Kondo exchange. We illustrate that one molecular type can be treated as an individual spin, whereas the other type is best described by a coupled spin system. Using the field dependence of the YSR excitations combined with modeling, we describe the quantum phase of each excitation type. These results provide an insight into the quantum nature of YSR excitations in magnetic field and a platform to study spin impurity models on superconductors in magnetic field.