Figure 1: Topography and inelastic spectroscopy of a single Fe and Ho atom. | Nature Communications

Figure 1: Topography and inelastic spectroscopy of a single Fe and Ho atom.

From: Absence of a spin-signature from a single Ho adatom as probed by spin-sensitive tunneling

Figure 1

(a) Constant-current image of an artificial arrangement of Fe and Ho atoms on fcc and hcp lattice sites (Vs=10 mV, Istab=0.5 nA). The overlaying white lattice has the lattice constant and orientation of the Pt(111) substrate but is centred on the Fehcp species and reveals the different adsorption sites of the atoms. The white scale bar has a length of 2 nm and the colour scale on the left side indicates the measured apparent height in a range of −23 to 164 pm. (b) Line profiles of the atoms in a taken from a topography recorded at Vs=−50 mV and Istab=100 pA. The dashed lines indicate the dedicated maximum heights. (c,d) spectra measured on the isolated Fe and Ho atoms of a using the same microtip. The dashed lines indicate previously reported spin-excitation energies5,8 (Istab=5 nA, Vstab=10 mV, Vmod=40 μV, fmod=4.142 kHz, =10 ms and Vsens=10 mV). (e) Magnetic field-dependent spectra measured on an isolated Ho atom at the indicated Bz values and settings as in d except for Istab=6 nA, Vstab=12 mV. Spectra in d,e have been normalized by subtraction of a substrate spectrum taken with the same microtip and are artificially offset for clarity.

Back to article page