Anomalous Hall Effect and Skyrmion Number in Real and Momentum Spaces(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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We study the anomalous Hall effect (AHE) for the double exchange model with the exchange coupling |J_H| being smaller than the bandwidth |t| for the purpose of clarifying the following unresolved andconfusing issues: (I) the effect of the underlying lattice structure, (ii) the relation between AHE and the skyrmion number, (iii) the duality between real and momentum spaces, and (iv) the role of disorder scatterings; which is more essential, σ_H (Hall conductivity) or ρ_H (Hall resistivity)? Starting from a generic expression for σ_H, we resolve all these issues and classify the regimes in the parameter space of J_Hτ (τ: elastic scattering time) and λ_s (length scale of spin texture). There are two distinct mechanisms of AHE; one is characterized by the real-space skyrmion number and the other by the momentum-space skyrmion density at the Fermi level, which occur in different regimes of the parameter space.
- 社団法人日本物理学会の論文
- 2004-10-15
著者
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Tatara Gen
Graduate School Of Science And Engineering Tokyo Metropolitan University:presto Jst
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Nagaosa Naoto
Correlated Electron Research Center (cerc) National Institute Of Advanced Industrial Science And Tec
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Nagaosa Naoto
Correlated Electron Research Center (cerc) National Institute Of Advanced Industrial Science And Tec
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ONODA Masaru
Correlated Electron Research Center (CERC), National Institute of Advanced Industrial Science and Te
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Onoda Masaru
Correlated Electron Research Center (cerc) National Institute Of Advanced Industrial Science And Tec
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Onoda Masaru
Correlated Electron Research Center (cerc) National Institute Of Advanced Industrial Science And Tec
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Tatara Gen
Graduate School Of Science And Engineering Tokyo Metropolitan University:presto Japan Science And Te
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