Excitation Spectra of the Two Impurity Anderson Model.I. : Critical Transition in the Two Magnetic Impurity Problem and the Roles of the Parity Splitting
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概要
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Excitation spectra of tlte tw'o impurity Anderson model are calculated by usiutg tlaenunterical renorxatalization group xatetlaod. Tlte critical transi[ioxt found by Jouaes etcl. is examined based 011 tlve xnodel tltat the parity' splitting is inducecl by the f-ftransfer matrix, l. The low energy scale, w,/ T., is approximnately giveut as (( j - 7.)/ 1.5)'-F(7/237'.)', and tlaus t suppresses the critical transition, wltere j is the ex-claange coupliuag nornvalized by the Koxado tenaperature T., 7.tlae critical value for tlaexaaodel w'ithout l. Tlte );-cocfficiemat is proportioxval to co, , xvltile IIIC antifer-romagnetic suscejctibility to In co7 . Tlte )chase shift clvaxages couttinuously uaear j.. Ittends to siutgular jump as t=O. Tlve jcarity splitting of tlae single jcarticle excitationsjoectrum is enhaxaced by the exclaange couplizag.two iuaapurity Anderson model, two iunpurity Koxtdo problem, nunaerieal renor-malizatiout group, heavy fermion
- 社団法人日本物理学会の論文
- 1992-07-15
著者
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SAKAI Osamu
Department of Physics, Tokyo Metropolitan University
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Shimizu Yukihiro
Department of Physics, Tohoku University
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Shimizu Yukihiro
Department Of Physics Tohoku University
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Shimizu Yukihiro
Department Of Applied Physics Tohoku University
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Sakai Osamu
Department Of Cardiovascular Surgery Kyoto Prefectural University Of Medicine
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