title: Spin-dependent Fano resonance induced by a conducting chiral helimagnet contained in a quasi-one-dimensional electron waveguide.
abstract: Fano resonance appears for conduction through an electron waveguide containing donor impurities. In this work, we consider the thin-film conducting chiral helimagnet (CCH) as the donor impurity in a one-dimensional waveguide model. The transmission and conductance for an arbitrary CCH spiral period are obtained. Due to the spin-spiral coupling, interference between the direct and inter-subband transmission channels gives rise to a spin-dependent Fano resonance effect. The spin-dependent Fano resonance is sensitively dependent on the helicity of the spiral. By tuning the CCH potential well depth and the incident energy, this provides a potential way to detect the spin-spiral period in the CCH.
authors.affiliation: Department of Physics, South China University of Technology, Guangzhou 510641, People's Republic of China. rzhu@scut.edu.cn
authors.forename: Rui
authors.initials: R
authors.lastname: Zhu
mesh_terms: D017097:Electric Impedance; D004583:Electrons; D059346:Magnets / Q000737:chemistry*; D013113:Spin Labels; D020349:Surface Plasmon Resonance; D014732:Vibration
chemical_list: D013113:Spin Labels