Scanning tunneling microscope operating as a spin diode

Scanning tunneling microscope operating as a spin diode

P. H. Penteado,1,2 F. M. Souza,2 A. C. Seridonio,3 E. Vernek,2 and J. C. Egues1 1Instituto de Fı́sica de São Carlos, Universidade de São Paulo, 13560-970, São Carlos, SP, Brazil 2Instituto de Fı́sica, Universidade Federal de Uberlândia, 38400-902, Uberlândia, MG, Brazil 3Departamento de Fı́sica e Quı́mica, Universidade Estadual Paulista Júlio de Mesquita Filho, 15385-000, Ilha Solteira, SP, Brazil....

Simulating Scanning Tunneling Microscope

Distinction of nuclear spin states with the scanning tunneling microscope.

We demonstrate rotational excitation spectroscopy with the scanning tunneling microscope for physisorbed H(2) and its isotopes HD and D(2). The observed excitation energies are very close to the gas phase values and show the expected scaling with the moment of inertia. Since these energies are characteristic for the molecular nuclear spin states we are able to identify the para and ortho specie...

Scanning tunneling microscope for magneto-optical imaging

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Reproducible Fabrication of Scanning Tunneling Microscope Tips

Reproducible fabrication of Scanning Tunneling Microscope tips is carried out following an electrochemical procedure widely reported. Tips are made from 0.5 diameter tungsten wire. Controlling fabrication parameters (immersion in the electrochemical solution, current-voltage ranges, duration of the process, among others) we achieve aspect ratios of 0.68 and tip radii of 330 nm in the best case....