title: Quantum pump effect induced by a linearly polarized microwave in a two-dimensional electron gas.
abstract: A quantum pump effect is predicted in an ideal homogeneous two-dimensional electron gas (2DEG) that is normally irradiated by linearly polarized microwaves (MW). Without considering effects from spin-orbital coupling or the magnetic field, it is found that a polarized MW can continuously pump electrons from the longitudinal to the transverse direction, or from the transverse to the longitudinal direction, in the central irradiated region. The large pump current is obtained for both the low frequency limit and the high frequency case. Its magnitude depends on sample properties such as the size of the radiated region, the power and frequency of the MW, etc. Through the calculated results, the pump current should be attributed to the dominant photon-assisted tunneling processes as well as the asymmetry of the electron density of states with respect to the Fermi energy.
authors.affiliation: Department of Physics and Hebei Advanced Thin Film Laboratory, Hebei Normal University, Hebei 050024, People's Republic of China.
authors.forename: Juntao
authors.initials: J
authors.lastname: Song
authors.forename: Haiwen
authors.initials: H
authors.lastname: Liu
authors.forename: Hua
authors.initials: H
authors.lastname: Jiang
mesh_terms: D003198:Computer Simulation; D004583:Electrons; D005740:Gases / Q000737:chemistry* / Q000528:radiation effects*; D008872:Microwaves; D008956:Models, Chemical; D011789:Quantum Theory
chemical_list: D005740:Gases