Itinerant Electron Antiferromagnetism in the Anderson Lattice Model

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概要

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• We investigate the antiferromagnetic naornent of heavy quasi-particles in the &-infinite degen-erate Anderson lattice model of the sqtrare lattice where the renornaalized bands have the nestedFermi stnrface. The conduction electron component IVI. and the f-electron coraaponent M( of theantiferromagnetic rnoment are treated separately. We fitad that AI??/Al. is rtmled by the singleparaxxeter m'/m as IXI(/Al. II: (gg/g.)(m"/m). In addition, in the Kondo regirrte, Al( is alrmostproportional to the nuttaber of f-electrons n(, and independent of an" /rn, while Al. is almostproportional to (m'/m) ', i.e. .'*Iv 'h .qrpn - knv and A?f. 'h .qcpn = kp.Tu, where p. representsthe D.O.S of the conduction electron band. The coefficient k depends on local unornents Mien off-electrons under crystal fields and the degree of the nesting effect. At the lizniting case that theFermi surface is perfectly nested and Air... : ')grpn, k reaches about l, thus Air reaches aboutIgvp.n at the limit of nv -S 1, i.e. 407 of' A/#.n., where the total tnorrtent Al (: Al. -F Air) nearlyequals Ivy( in the Kondo regirne. As the degree of' the nesting effect decreases, k approaches zero,and then the systena beconaes nonrnagnetic when k equals zero.

• 社団法人日本物理学会の論文
• 1998-03-15

著者

• MATSUURA Tamifusa

  Department of Physics,Nagoya University

• Tamifusa Matsuura

  Department Of Physics Nagoya University

• Matsuura Tamifusa

  Department Of Physics Nagoya University

• KOBAYASHI Akito

  CREST, Japan Science and Technology Corporation (JST)

• Kobayashi Akito

  Crest Japan Science And Technology Corporation (jst)

• MATSUURA Tamifusa

  Physics Department, Nagoya University

• MATSUURA Tamifusa

  Department of Physics, Nagaya University

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