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1. Cheong, W. & Zhang, L. Molecular dynamics simulation of phase transformations in silicon monocrystals due to nano-indentation. Nanotechnology 11, 173¨C180 (2000).
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1. Cheong, W. & Zhang, L. Molecular dynamics simulation of phase transformations in silicon monocrystals due to nano-indentation. Nanotechnology 11, 173¨C180 (2000).

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/*----------------------------------------------------------------------------80
The units used in this program are as follows:
    (1) The basic units are chosen to be
        (A) Mechanics
            -- energy: eV (electron volt)
            -- length: A (Angstrom)
            -- mass: amu (atomic mass unit)
        (B) Thermodynamics
            -- temperature: K (Kelvin)
        (C) Electricity
            -- charge: e (elementary charge)
    (2) Some derived units are
        (A) Mechanics
            -- time: A amu^(1/2) eV^(-1/2) ~ 10 fs
            -- velocity: eV^(1/2) amu^(-1/2) ~ 0.1 A fs^(-1)
            -- acceleration: eV A^(-1) amu^(-1) ~ 0.01 A fs^(-2)
            -- force: eV A^(-1)
        (B) Thermodynamics
            Boltzmann constant: K_B ~ 0.8625 * 10^(-4) eV K^(-1)
        (C) Electricity
            --electrostatic constant: K_C = 1 / (4 * PI * epsilon_0)
                                          ~ 14.4 eV A e^(-2)
------------------------------------------------------------------------------*/

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