Selecting the tip electron orbital for scanning tunneling microscopy imaging with sub-?ngstrom lateral resolution
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Citation:A. N. Chaika, S. S. Nazin, V. N. Semenov, S. I. Bozhko, O. Lubben, S. A. Krasnikov, K. Radican and I. V. Shvets, Selecting the tip electron orbital for scanning tunneling microscopy imaging with sub-?ngstrom lateral resolution, EPL (Europhysics Letters), 92, 4, 2010, 6
We report on scanning tunneling microscopy (STM) studies performed with single crystalline W tips on a graphite(0001) surface. Results of distance-dependent STM experiments with sub-?ngstrom lateral resolution and density functional theory electronic structure calculations show how to controllably select one of the tip electron orbitals for high-resolution STM imaging. This is confirmed by experimental images reproducing the shape of the 5dxz,yz and 5dx2 ? y2 tungsten atomic orbitals. The presented data demonstrate that the application of oriented single crystalline probes can provide further control of spatial resolution and expand the capabilities of STM.
Keywords:Particles and fields physics
Publisher:Institute of Physics
Series/Report no:EPL (Europhysics Letters);