Transport properties of vertical heterostructures under light irradiation
arXiv:2208.03702 · doi:10.1103/PhysRevB.106.085409
Abstract
Electronic and transport properties of bilayer heterostructure under light irradiation are of fundamental interest to improve functionality of optoelectronic devices. We theoretically study the modification of transport properties of bilayer graphene and bilayer heterostructures under a time-periodic external light field. The bulk electronic and transport properties are studied in a Landauer-type configuration by using the nonequilibrium Green's function formalism. To illustrate the behavior of the differential conductance of a bilayer contact under light illumination, we consider tight-binding models of bilayer graphene and graphene/hexagonal boron-nitride heterostructures. The non-adiabatic driving induces sidebands of the original band structure and opening of gaps in the quasienergy spectrum. In transport properties, the gap openings are manifested in a suppression of the differential conductance. In addition to suppression, an external light field induces an enhancement of the differential conductance if photoexcited electrons tunnel into or out of a Van~Hove singularity.
9 pages, 7 figures
References in corpus (28)
- The electronic properties of graphene
- Universal Dynamic Conductivity and Quantized Visible Opacity of Suspended Graphene
- Ultrahigh electron mobility in suspended graphene
- 2D materials and van der Waals heterostructures
- Graphene photodetectors for high-speed optical communications
- Photovoltaic Hall effect in graphene
- Topological characterization of periodically-driven quantum systems
- Driven quantum transport on the nanoscale
- Irradiated graphene as a tunable Floquet topological insulator
- Tuning laser-induced bandgaps in graphene
- Multiterminal Conductance of a Floquet Topological Insulator
- Out of equilibrium electrons and the Hall conductance of a Floquet topological insulator
- Energy gap tuning in graphene on hexagonal boron nitride bilayer system
- Effective Theory of Floquet Topological Transitions
- Dissipative Floquet Topological Systems
- Dictionary between scattering matrix and Keldysh formalisms for quantum transport driven by time-periodic fields
- Effect of radiation on transport in graphene
- Radiation effects on the electronic structure of bilayer graphene
- Generation of valley polarized current in bilayer graphene
- Occupation of topological Floquet bands in open systems
- Floquet band structure of a semi-Dirac system
- Non-perturbative laser effects on the electrical properties of graphene nanoribbons
- One-way transport in laser-illuminated bilayer graphene: A Floquet isolator
- Laser-induced effects on the electronic features of graphene nanoribbons
- Ballistic transport through irradiated graphene
- Nonlinear response of a ballistic graphene transistor with an ac-driven gate: high harmonic generation and THz detection
- Transport through vertical graphene contacts under intense laser fields
- Floquet boundary states in AB-stacked graphite