Collective fermion excitation in a warm massless Dirac system

Daqing Liu; Shuyue Chen; Shengli Zhang; Ning Ma

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arXiv · 1601.01042

Collective fermion excitation in a warm massless Dirac system

Daqing Liu·Shuyue Chen·Shengli Zhang·Ning Ma

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Abstract

Basing on a self-consistent method, we predict theoretically that there occurs not only a normal (quasi) fermion mode, but also a collective fermion mode, plasmino, in a warm 2D massless Dirac system, especially in a warm intrinsic graphene system. Results of Landau damping show that both fermion and plasmino are well defined modes. We find that there are sharp differences between the discussed system and the QCD/QED system. Firstly, the thermal mass is proportional to $α_g^{3/4}T$ but not $α_g T$. Secondly, at $0 q_c$. Thirdly, the fermion behaves as a "relativity particles" with none zero mass and the plasmino exhibits an anormal dispersion at moderate momentum.

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Daqing Liu, Shuyue Chen, Shengli Zhang, Ning Ma. 2016-05-27. Collective fermion excitation in a warm massless Dirac system. https://arxiv.org/abs/1601.01042

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