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Topological nematic phase in Dirac semi-metals

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arxiv 1503.00358 v2 pith:WTLZMKUJ submitted 2015-03-01 cond-mat.str-el cond-mat.mes-hall

Topological nematic phase in Dirac semi-metals

Rui-Xing Zhang , Jimmy A. Hutasoit , Yan Sun , Binghai Yan , Cenke Xu , Chao-Xing Liu This is my paper
classification cond-mat.str-el cond-mat.mes-hall
keywords nematicdiracphaseordersphasessemimetaltopologicalapplying
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We study the interaction effect in a three dimensional Dirac semimetal and find that two competing orders, charge-density-wave orders and nematic orders, can be induced to gap the Dirac points. Applying a magnetic field can further induce an instability towards forming these ordered phases. The charge density wave phase is similar as that of a Weyl semimetal while the nematic phase is unique for Dirac semimetals. Gapless zero modes are found in the vortex core formed by nematic order parameters, indicating the topological nature of nematic phases. The nematic phase can be observed experimentally using scanning tunnelling microscopy.

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