Journal
PHYSICAL REVIEW B
Volume 93, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.93.041108
Keywords
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Funding
- Office of Naval Research [N00014-15-1-2675]
- Penn State MRSEC
- Center for Nanoscale Science
- Award NSF [DMR-1420620]
- NSF [DMR-1005536, DMR-0820404, DMR-1151208]
- David and Lucile Packard Foundation
- Direct For Mathematical & Physical Scien [1151208] Funding Source: National Science Foundation
- Division Of Materials Research [1151208] Funding Source: National Science Foundation
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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 to that of aWeyl 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 tunneling microscopy.
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