Simple formulas for the oscillating component of the electrical conductivity of layered chargeordered crystals |
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Authors: | P V Gorskii |
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Institution: | (1) Yu. Fed’kovich Chernovtsy National University, Russia |
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Abstract: | In the present paper, oscillations of the longitudinal component of the electrical conductivity of layered crystals are examined
in electric and quantizing magnetic fields perpendicular to the layers. It is demonstrated that frequencies and amplitudes
of longitudinal conductivity oscillations can be determined with sufficient accuracy through the chemical potential of the
electron gas and effective width of the miniband caused by the charge ordering. In addition, based on an analysis of formulas
for the transverse conductivity, it is established that the applicability limits for the transverse conductivity in the semiclassical
approximation (for the magnetic field induction) in the field perpendicular to the layers are much wider than for the longitudinal
conductivity. An immediate reason for this is the zero longitudinal velocity of current carriers in the extreme cross sections,
which leads to the field dependence of the amplitudes of longitudinal conductivity oscillations stronger than of transverse
ones. Calculated results are used to interpret experimental data obtained for the β-(ET)2IBr2 synthetic metals.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 5, pp. 34–43, May, 2006. |
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Keywords: | |
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