Magnetic-Field Dependence of the Local Electronic Structure in the Ground State of the s-d Exchange System and Magnetoresistance at 0-K

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概要

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• Recent two publications by Yosida and Yoshimori have clarified the detailed electronic structure of the singlet collective bound state developed so far by them and by Okiji. In this paper, by means of their method, the magnetic-field dependence of the local electronic structure of the ground state is investigated. In particular, it is shown that the z-component of the spin correlation which sticks around the impurity remains unchanged even in the limit of increasing field. From this calculation, an expression for the magnetoresistance is inferred with the aid of the Friedel sum rule: R(Δ=R_0cos^2π/2Δ/((E^^~_0^2+Δ^2)^<1/2>), where E^^~_0 denotes the binding energy of the singlet state and Δ the Zeeman energy of the free spin. It is to be noticed that this has no logarithmic field dependence. It is further shown that the relation <σ>=(ρJ/2N)<S_z> holds generally between the spin polarization of the conduction electrons and the induced localized spin.

• 理論物理学刊行会の論文
• 1970-03-25

著者

• Ishii Hiroumi

  Institute For Solid State Physics University Of Tokyo

関連論文

• Zero-Temperature Susceptibility of a Localized Spin Exchange Coupled with the Conduction Electrons
• Magnetic-Field Dependence of the Bound State Due to the s-d Exchange Interaction
• Magnetic-Field Dependence of the Local Electronic Structure in the Ground State of the s-d Exchange System and Magnetoresistance at 0-K

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