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The time-dependent expectation value of the triplet metastable He atom is obtained by starting from the singlet state and solving the time-dependent Schrodinger equation directly, to the eighth-order of V where V is the transfer integral between the conduction electron state and the 2s state of the He atom. The results show that rapid singlet-triplet conversion on the low work-function metal surface...
The influence of steps on the arrangement of the buckling of dimers of an Si(001) surface has been studied by Monte Carlo simulation. Coupling constants for the buckling of the dimers were determined by first-principles calculations. We treated the S A step for the buckling of dimers by the free boundary condition. It was found that the fluctuation extends over a long distance from the edge...
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