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arXiv · 1010.4749

Nernst quantum oscillations in bulk semi-metals

Zengwei Zhu·Huan Yang·Aritra Banerjee·Benoit Fauque·Kamran Behnia
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Abstract

With a widely available magnetic field of 10 T, one can attain the quantum limit in bismuth and graphite. At zero magnetic field, these two elemental semi-metals host a dilute liquid of carriers of both signs. When the quantum limit is attained, all quasi-particles are confined to a few Landau tubes. Each time a Landau tube is squeezed before definitely leaving the Fermi surface, the Nernst response sharply peaks. In bismuth, additional Nernst peaks, unexpected in the non-interacting picture, are resolved beyond the quantum limit. The amplitude of these unexpected Nernst peaks is larger in the samples with the longest electron mean-free-path.

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Zengwei Zhu, Huan Yang, Aritra Banerjee, Benoit Fauque, Kamran Behnia. 2010-10-22. Nernst quantum oscillations in bulk semi-metals. https://doi.org/10.1088/0953-8984/23/9/094204

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