Control of the Magnetic Interaction between Single-Molecule Magnet TbPc and Superconductor NbSe Surface by an Intercalated Co Atom.

We demonstrate that an intercalated Co atom in superconductor NbSe could control the magnetic interaction between the adsorbed magnetic molecule of TbPc and the NbSe substrate. An intercalated Co atom enhances the magnetic interaction between the NbSe and the TbPc spin to cause Kondo resonance at the TbPc position, a spin-singlet state formed by the itinerary electron. By applying a surface-normal magnetic field, we change the molecule's spin direction from the initial one directed to the Co atom to the surface normal.

Observation of a Yu-Shiba-Rusinov state originating from the magnetic moment in a curved monolayer island of 1T-phase NbSe .

We report the finding of a 1T phase island of NbSe on a cleaved surface and its magnetic properties. Tunneling spectroscopy at 400 mK shows robust peaks in the superconducting gap, which we assign to the Yu-Shiba-Rusinov (YSR) state originating from the magnetic moment placed in the superconducting state. The YSR peak appears on a specific position of an island of the 1T phase, not on the surrounding 2H phase area, and shows an anisotropic decay behavior.

Observation of Yu-Shiba-Rusinov States and Inelastic Tunneling Spectroscopy for Intramolecule Magnetic Exchange Interaction Energy of Terbium Phthalocyanine (TbPc) Species Adsorbed on Superconductor NbSe.

We investigated the spin properties of the terbium phthalocyanine (TbPc) species adsorbed on the superconductor NbSe surface using scanning tunneling microscopy and spectroscopy. TbPc is a molecule in a class of single-molecule magnets (SMMs), and the use of superconductor electrodes attracts attention for the application to the devices using the spin degree of freedom. TbPc is a building block of TbPc and can reveal the spin component's behavior.

Morphology of size-selected Pt clusters on CeO(111).

Supported Pt catalysts and ceria are well known for their application in automotive exhaust catalysts. Size-selected Pt clusters supported on a CeO(111) surface exhibit distinct physical and chemical properties. We investigated the morphology of the size-selected Pt (n = 5-13) clusters on a CeO(111) surface using scanning tunneling microscopy at room temperature.

Epitaxial growth of CeO2(111) film on Ru(0001): scanning tunneling microscopy (STM) and x-ray photoemission spectroscopy (XPS) study.

We formed an epitaxial film of CeO2(111) by sublimating Ce atoms on Ru(0001) surface kept at elevated temperature in an oxygen ambient. X-ray photoemission spectroscopy measurement revealed a decrease of Ce(4+)/Ce(3+) ratio in a small temperature window of the growth temperature between 1070 and 1096 K, which corresponds to the reduction of the CeO2(111). Scanning tunneling microscope image showed that a film with a wide terrace and a sharp step edge was obtained when the film was grown at the temperatures close to the reduction temperature, and the terrace width observed on the sample grown at 1060 K was more than twice of that grown at 1040 K.