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Giant Nernst-Ettingshausen oscillations in semiclassically strong magnetic fields
Igor A Luk'yanchuk1, Andrei A Varlamov, Alexey V Kavokin
1Laboratory of Condensed Matter Physics, University of Picardie Jules Verne, Amiens, France.
Abstract:
We consider the Nernst-Ettingshausen (NE) effect in the presence of semiclassically strong magnetic fields for a quasi-two-dimensional system with a parabolic or linear dispersion of carriers. We show that the occurring giant oscillations of the NE coefficient are coherent with the recent experimental observation in graphene, graphite, and bismuth. In the 2D case we find the exact shape of these oscillations and show that their magnitude decreases (increases) with enhancement of the Fermi energy for Dirac fermions (normal carriers). With a crossover to the 3D spectrum the phase of the oscillations shifts, their amplitude decreases, and the peaks become asymmetric.
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