Report
Floquet engineering of topological phase transitions in quantum spin Hall $\alpha$-$T_{3}$ system
| العنوان: | Floquet engineering of topological phase transitions in quantum spin Hall $\alpha$-$T_{3}$ system |
|---|---|
| المؤلفون: | Lee, Kok Wai, Calderon, Mateo Jalen Andrew, Yu, Xiang-Long, Lee, Ching Hua, Ang, Yee Sin, Fu, Pei-Hao |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science |
| الوصف: | Floquet engineering of topological phase transitions driven by a high-frequency time-periodic field is a promising approach to realizing new topological phases of matter distinct from static states. Here, we theoretically investigate Floquet engineering topological phase transitions in the quantum spin Hall $\alpha$-$T_{3}$ system driven by an off-resonant circularly polarized light. In addition to the quantum spin (anomalous) Hall insulator phase with multiple helical (chiral) edge states, spin-polarized topological metallic phases are observed, where the bulk topological band gap of one spin sub-band overlaps with the other gapless spin sub-band. Moreover, with a staggered potential, the topological invariants of the system depend on whether the middle band is occupied because of the breaking of symmetry with respect to the center of energy-momentum plane. Our work highlights the significance of Floquet engineering in realizing new topological phases in $\alpha$-$T_{3}$ lattices. Comment: 12 pages, 6 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.111.045406 |
| URL الوصول: | http://arxiv.org/abs/2408.02093 |
| رقم الانضمام: | edsarx.2408.02093 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.111.045406 |
|---|