Giant Nernst-Ettingshausen oscillations in Semiclassically strong magnetic fields

Details Giant Nernst-Ettingshausen oscillations in Semiclassically strong magnetic fields Giant Nernst-Ettingshausen oscillations in Semiclassically strong magnetic fields

2010-11-28

arxiv.org/abs/1011.6067v2

Phys. Rev. Lett. 107, 016601 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevLett.107.016601

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 3D spectrum the phase of oscillations shifts, their amplitude decreases and the peaks become asymmetric.

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