c(4 × 2) and related structural units on the SrTiO3(001) surface: scanning tunneling microscopy, density functional theory, and atomic structure.

The (2×2) reconstructions on the SrTiO3 (001) surface: A combined scanning tunneling microscopy and density functional theory study

Surface and defect structure of oxide nanowires on SrTiO3.

Processing the SrTiO(3)(001) surface results in the self-assembly of reduced titanate nanowires whose widths are approximately 1 nm. We have imaged these nanowires and their defects at elevated temperatures by atomic resolution scanning tunneling microscopy. The nanowire structure is modeled with density functional theory, and defects observed in the center of the nanowire are determined to be ...

Atomic scale structure of InAs(001)-(2 4) steady-state surfaces determined by scanning tunneling microscopy and density functional theory

The structure of InAs(0 0 1)-ð2 4Þ surfaces equilibrated under typical MBE conditions is studied by scanning tunneling microscopy (STM). Depending on the magnitude of the As flux, typical surfaces are found to contain a mixture of a2ð2 4Þ and b2ð2 4Þ reconstructions. The relative populations of the a2 and b2 reconstructions are found to depend on substrate temperature and the magnitude of the A...

Structure of Self-Assembled Mn Atom Chains on Si(001).

Mn has been found to self-assemble into atomic chains running perpendicular to the surface dimer reconstruction on Si(001). They differ from other atomic chains by a striking asymmetric appearance in filled state scanning tunneling microscopy (STM) images. This has prompted complicated structural models involving up to three Mn atoms per chain unit. Combining STM, atomic force microscopy, and d...

Atomic structure of Mn wires on Si(001) resolved by scanning tunneling microscopy.

At submonolayer coverage, Mn forms atomic wires on the Si(001) surface oriented perpendicular to the underlying Si dimer rows. While many other elements form symmetric dimer wires at room temperature, we show that Mn wires have an asymmetric appearance and pin the Si dimers nearby. We find that an atomic configuration with a Mn trimer unit cell can explain these observations as due to the inter...