"Structure of Cleaved (001) USb2 Single Crystal Surface"

Shao-Ping Chena: Marilyn Hawley, Phil B. Van Stockum, Hari C. Manoharan and Eric Bauer; MRS Proceedings, 04/15/11.

Additional Authors: Marilyn Hawley, Phil B. Van Stockum, Hari C. Manoharan and Eric Bauer

Abstract:

We have achieved what we believe to be the first atomic resolution STM images for a uranium compound taken at room temperature. The a, b, and c lattice parameters in the images confirm that the USb2 crystals cleave on the (001) basal plane as expected. The a and b dimensions were equal, with the atoms arranged in a cubic pattern. Our calculations indicate a symmetric cut between Sb planes to be the most favorable cleavage plane and U atoms to be responsible for most of the DOS measured by STM. Some strange features observed in the STM will be discussed in conjunction with ab initio calculations.