794 research outputs found
Mr. Pickwick Was Roused: Sleeping and Awakening in The Pickwick Papers
An earlier version of this paper was presented orally in Japanese at the Annual Conference of the English Literary Society of Kyoto University on 13 November, 2021
First-principles study on field evaporation for silicon atom on Si(001) surface
The simulations of field-evaporation processes for silicon atoms on various
Si(001) surfaces are implemented using the first-principles calculations based
on the real-space finite-difference method. We find that the atoms which locate
on atomically flat Si(001) surfaces and at step edges are easily removed by
applying external electric field, and the threshold value of the external
electric field for evaporation of atoms on atomically flat Si(001) surfaces,
which is predicted between 3.0 and 3.5 V/\AA, is in agreement with the
experimental data of 3.8 V/\AA. In this situation, the local field around an
evaporating atom does not play a crucial role. This result is instead
interpreted in terms of the bond strength between an evaporating atom and
surface.Comment: 5 pages and 4 figure
First-Principles Study for Evidence of Low Interface Defect Density at Ge/GeO Interfaces
We present the evidence of the low defect density at Ge/GeO interfaces in
terms of first-principles total energy calculations. The energy advantages of
the atom emission from the Ge/GeO interface to release the stress due to
the lattice mismatch are compared with those from the Si/SiO interface. The
energy advantages of the Ge/GeO are found to be smaller than those of the
Si/SiO because of the high flexibility of the bonding networks in GeO.
Thus, the suppression of the Ge-atom emission during the oxidation process
leads to the improved electrical properties of the Ge/GeO interfaces
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