Dirac constant


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Dirac constant

n
(Atomic Physics) a constant used in quantum mechanics, equal to the Planck constant divided by 2π. It has a value of 1.054571596±0.000000078 × 10–34 joule seconds. Symbol: ħ or Also called: crossed-h or h-bar
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where [m.sup.*] provided by (4) can be considered as the efficient electron mass in the ZGNS, (t = 3.0 ev) is the closest neighbour C-C overlap energy, [E.sub.c] denotes the energy of the conductance band derived as [E.sub.c] = 0.5t + (3[L.sup.2])/(2[n.sup.2]), L shows the length of the spiral in GNS, and n stands for the chirality, while h signifies the reduced Planck's constant or Dirac constant. Figures 4 and 5 exhibit the DOS as a function of E (k) for diverse values of (n) and (L).