Effective Floquet Hamiltonian in the low-frequency regime
| dc.creator | Vogl, Michael | |
| dc.creator | Rodriguez-Vega, Martin | |
| dc.creator | Fiete, Gregory A. | |
| dc.date.accessioned | 2024-01-18T14:55:19Z | |
| dc.date.available | 2024-01-18T14:55:19Z | |
| dc.date.issued | 2020-01-09 | |
| dc.description.abstract | We develop a theory to derive effective Floquet Hamiltonians in the weak drive and low-frequency regime. We construct the theory in analogy with band theory for electrons in a spatially-periodic and weak potential, such as occurs in some crystalline materials. As a prototypical example, we apply this theory to graphene driven by circularly polarized light of low intensity. We find an ana- lytic expression for the effective Floquet Hamiltonian in the low-frequency regime which accurately predicts the quasienergy spectrum and the Floquet states. Furthermore, we identify self-consistency as the crucial feature effective Hamiltonians in this regime need to satisfy to achieve high accuracy. The method is useful in providing a realistic description of off-resonant drives for multi-band solid state systems where light-induced topological band structure changes are sought. | |
| dc.description.department | Center for Dynamics and Control of Materials | |
| dc.description.sponsorship | This work was supported by the NSF Ma- terials Research Science and Engineering Center Grant No. DMR-1720595. | |
| dc.identifier.doi | 10.1103/PhysRevB.101.024303 | |
| dc.identifier.uri | https://hdl.handle.net/2152/123438 | |
| dc.identifier.uri | https://doi.org/10.26153/tsw/50234 | |
| dc.language.iso | en_US | |
| dc.relation.ispartof | Center for Dynamics and Control of Materials Publications | |
| dc.rights.restriction | Open | |
| dc.subject | Floquet Hamiltonian | |
| dc.title | Effective Floquet Hamiltonian in the low-frequency regime | |
| dc.type | Article |