Equation Dirac

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    3 32 2

    1 1 1 1

    1-3 plane1-2 plane 1-2 plane 1-3 plane

    p = 0 | p | >> m

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    ct

    a

    ct

    (ct ;-a,0,0)

    0

    x

    0

    0

    1

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    +mc

    energy gap

    E

    A

    B

    2

    -mc 2

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    V(z)

    z

    E

    V

    I II III

    2mc

    V + mc

    V + mc2 2

    0

    0

    0

    2

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    V

    V(z)

    z

    I II

    +mc

    -mc

    0

    2

    2

    (z) = + (z) = +I in refl I in out

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