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Abstract
We investigate one of the possibilities for production of carriers in diamond resulting in its absolute negative conductivity at low temperatures T ∼ 10 – 30 K. Production and dynamics of electrons and holes in diamond at the irradiation by picosecond laser pulse with the peak laser intensity of 1010 W/cm2 has been considered and compared to each other. Then carriers are cooled due to emission of acoustic phonons. Diamond heating is estimated in focussing region. The conclusion has been made about small local increasing of lattice temperature in the irradiation region. Thus, laser irradiation can produce conditions for possible experimental observation of an absolute negative conductivity of diamond at low temperatures.
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