Abstract
Abstract For the analysis of the de Haas-van Alphen (dHvA) oscillation, the Lifshitz and Kosevich (LK) formula is used. However, it is known that the LK formula is not suitable to the analysis of the dHvA oscillation in quasi-two-dimensional (Q2D) and two-dimensional (2D) systems. Recently, the formula for dHvA oscillations in the 2D and Q2D multi-band systems has been derived. We apply this Q2D formula to the Q2D material κ-(BEDT-TTF)2Cu(NCS)2. As a result, we obtain that the temperature (T)-dependencies of amplitudes of α (resp. β) oscillations of the Q2D formula are slightly (substantially) different from those of the LK formula below 0.4 K although the T-dependencies of the Q2D formula are the same as those of the LK formula above 0.4 K . This means that a good fit for the T-dependence of amplitudes of the dHvA experiments below 0.4 K in that compound would be obtained only by the Q2D formula.
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