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.
- Publication:
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Journal of Physics Condensed Matter
- Pub Date:
- January 2013
- DOI:
- 10.1088/0953-8984/25/3/036001
- arXiv:
- arXiv:1207.0490
- Bibcode:
- 2013JPCM...25c6001Z
- Keywords:
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- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 14 pages, 6 figures