Precessing anisotropic Dirac cone and Landau subbands along a nodal spiral
We derive a three-dimensional Dirac-cone structure composed of tilted anisotropic Dirac cones around spirally located Dirac points. The Dirac points form a nodal spiral in momentum space due to accidental degeneracy, which can be realized in rhombohedral graphite. Under the interlayer electron hoppi...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2013-01-01
|
| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/15/5/053032 |
| _version_ | 1797751573064974336 |
|---|---|
| author | C H Ho C P Chang W P Su M F Lin |
| author_facet | C H Ho C P Chang W P Su M F Lin |
| author_sort | C H Ho |
| collection | DOAJ |
| description | We derive a three-dimensional Dirac-cone structure composed of tilted anisotropic Dirac cones around spirally located Dirac points. The Dirac points form a nodal spiral in momentum space due to accidental degeneracy, which can be realized in rhombohedral graphite. Under the interlayer electron hoppings, the Dirac cone varies in orientation and shape along this Dirac-point spiral, like a magic gyro precessing and deforming with time. The cone precession is governed by the hopping along the rhombohedral primitive unit vectors. In a perpendicular magnetic field, the electron orbits are related to different Landau level energies under the same quantization condition. The Landau subbands are thus characterized by a dispersion factor in addition to the zero-mode spectrum determined by the Dirac-point spiral. |
| first_indexed | 2024-03-12T16:50:29Z |
| format | Article |
| id | doaj.art-4bf07f0b8fcc421da77a0d308ec0b19b |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:50:29Z |
| publishDate | 2013-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-4bf07f0b8fcc421da77a0d308ec0b19b2023-08-08T11:10:28ZengIOP PublishingNew Journal of Physics1367-26302013-01-0115505303210.1088/1367-2630/15/5/053032Precessing anisotropic Dirac cone and Landau subbands along a nodal spiralC H Ho0C P Chang1W P Su2M F Lin3Center for General Education, Tainan University of Technology , Tainan 710, TaiwanCenter for General Education, Tainan University of Technology , Tainan 710, TaiwanDepartment of Physics and Texas Center for Superconductivity, University of Houston , TX 77204, USADepartment of Physics, National Cheng Kung University , Tainan 701, TaiwanWe derive a three-dimensional Dirac-cone structure composed of tilted anisotropic Dirac cones around spirally located Dirac points. The Dirac points form a nodal spiral in momentum space due to accidental degeneracy, which can be realized in rhombohedral graphite. Under the interlayer electron hoppings, the Dirac cone varies in orientation and shape along this Dirac-point spiral, like a magic gyro precessing and deforming with time. The cone precession is governed by the hopping along the rhombohedral primitive unit vectors. In a perpendicular magnetic field, the electron orbits are related to different Landau level energies under the same quantization condition. The Landau subbands are thus characterized by a dispersion factor in addition to the zero-mode spectrum determined by the Dirac-point spiral.https://doi.org/10.1088/1367-2630/15/5/053032 |
| spellingShingle | C H Ho C P Chang W P Su M F Lin Precessing anisotropic Dirac cone and Landau subbands along a nodal spiral New Journal of Physics |
| title | Precessing anisotropic Dirac cone and Landau subbands along a nodal spiral |
| title_full | Precessing anisotropic Dirac cone and Landau subbands along a nodal spiral |
| title_fullStr | Precessing anisotropic Dirac cone and Landau subbands along a nodal spiral |
| title_full_unstemmed | Precessing anisotropic Dirac cone and Landau subbands along a nodal spiral |
| title_short | Precessing anisotropic Dirac cone and Landau subbands along a nodal spiral |
| title_sort | precessing anisotropic dirac cone and landau subbands along a nodal spiral |
| url | https://doi.org/10.1088/1367-2630/15/5/053032 |
| work_keys_str_mv | AT chho precessinganisotropicdiracconeandlandausubbandsalonganodalspiral AT cpchang precessinganisotropicdiracconeandlandausubbandsalonganodalspiral AT wpsu precessinganisotropicdiracconeandlandausubbandsalonganodalspiral AT mflin precessinganisotropicdiracconeandlandausubbandsalonganodalspiral |