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Tunneling Images of Germanium Surface Reconstructions and Phase Boundaries
(American Physical Society (APS), 1985)
We have imaged with the tunneling microscope the microscopic surface topography of germanium layers grown by molecular-beam epitaxy on Si(111)-7×7. The surface structures corresponding to Ge(111)-c2×8 and Ge(111)-7×7 are ...
Real-Space Observation of Surface States on Si(111) 7×7 with the Tunneling Microscope
(American Physical Society (APS), 1985)
We have observed surface states indigenous to the Si(111) 7×7 superlattice with the tunneling microscope. The data show the states' energies and strengths to be strongly dependent on position in the unit mesh. Implications ...
Tunneling Images of Atomic Steps on the Si(111)7×7 Surface
(American Physical Society (APS), 1985)
Tunneling images of single atomic steps on Si(111) have been obtained with a tunneling microscope. The 7×7 reconstruction is observed to persist essentially undistorted right up to the steps. The position of each step ...
Electron Interferometry at Crystal Surfaces
(American Physical Society (APS), 1985)
Electron standing waves formed in the vacuum gap between the probe and the sample of the tunneling microscope are observed. The sensitivity of the standing-wave positions and frequencies to the surface potential are ...
Tunneling images of the 5x5 surface reconstruction on GeSi(III)
(American Physical Society (APS), 1985)
Germanium-silicon alloys can be prepared on crystalline silicon (111) substrates and have been observed to have 5x5 surface reconstructions. We present tunneling images of this surface which show that it has strong ...
X-ray-standing-wave interface studies of germanium on Si(111)
(American Physical Society (APS), 1985)
The position of germanium atoms on a Si(111) (7×7) surface prepared in a molecular-beam-epitaxy system have been established using the characteristic fluorescence generated by x-ray standing waves. For submonolayer coverages ...