Probing the shape of atoms in real space

Details Probing the shape of atoms in real space Probing the shape of atoms in real space

2003-05-06

arxiv.org/abs/cond-mat/0305103v1

Physical Review B 68, 045301 (2003)

Physics

Condensed Matter

Materials Science

Submitted to Phys. Rev. B, 17 pages, 7 figures

Scientific paper

10.1103/PhysRevB.68.045301

The structure of single atoms in real space is investigated by scanning tunneling microscopy. Very high resolution is possible by a dramatic reduction of the tip-sample distance. The instabilities which are normally encountered when using small tip-sample distances are avoided by oscillating the tip of the scanning tunneling microscope vertically with respect to the sample. The surface atoms of Si(111)-(7 x 7) with their well-known electronic configuration are used to image individual samarium, cobalt, iron and silicon atoms. The resulting images resemble the charge density corresponding to 4f, 3d and 3p atomic orbitals.

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