Chiral Luttinger liquids in graphene tuned by irradiation
| Autor: | Sumathi Rao, Tridev Mishra, Sourav Biswas, Arijit Kundu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Graphene FOS: Physical sciences Charge density 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences law.invention Luttinger liquid law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Coulomb Irradiation 010306 general physics 0210 nano-technology Bilayer graphene Circular polarization |
| Zdroj: | Physical Review B. 102 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.102.155428 |
| Popis: | We show that chiral co-propagating Luttinger liquids can be created and tuned by shining high frequency, circularly polarized light, normal to the layers, with different polarizations on two sections of bilayer graphene. By virtue of the broken time-reversal symmetry and the resulting mismatch of Chern number, the one-dimensional chiral modes are localized along the domain wall where the polarization changes. Single layer graphene hosts a single chiral edge mode near each Dirac node, whereas in bilayer graphene, there are two chiral modes near each of the Dirac nodes. These modes, under a high-frequency drive, essentially have a static charge distribution and form a chiral Luttinger liquid under Coulomb interaction, which can be tuned by means of the driving parameters. We also note that unlike the Luttinger liquids created by electrostatic confinement in bilayer graphene, here there is no back-scattering, and hence our wires along the node are stable to disorder. Comment: 12 pages, 5 figures |
| Databáze: | OpenAIRE |
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