TY - JOUR

T1 - Theory of momentum-dependent magnetic response in heavy-fermion systems

AU - Kuramoto, Y.

AU - Watanabe, T.

N1 - Funding Information:
This work is supported by a Grant-in-Aid for

PY - 1987/12

Y1 - 1987/12

N2 - A self-consistent dynamical theory is presented for the Anderson lattice. In a variational Lagrangian formulation a trial conduction-electron propagator is introduced. A variational principle leads to optimization of the propagator with the accuracy of O 1 2 where zn is the number of interacting neighbors. The extended non-crossing approximation (XNCA) is reproduced as a special case of the present theory. An integral equation is obtained for the dynamical susceptibility which incorporates the RKKY interaction and the Kondo effect. The closed-form solution is given in a case where perturbation theory is applicable.

AB - A self-consistent dynamical theory is presented for the Anderson lattice. In a variational Lagrangian formulation a trial conduction-electron propagator is introduced. A variational principle leads to optimization of the propagator with the accuracy of O 1 2 where zn is the number of interacting neighbors. The extended non-crossing approximation (XNCA) is reproduced as a special case of the present theory. An integral equation is obtained for the dynamical susceptibility which incorporates the RKKY interaction and the Kondo effect. The closed-form solution is given in a case where perturbation theory is applicable.

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U2 - 10.1016/0378-4363(87)90164-1

DO - 10.1016/0378-4363(87)90164-1

M3 - Article

AN - SCOPUS:0023559650

VL - 148

SP - 80

EP - 83

JO - Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics

JF - Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics

SN - 0378-4363

IS - 1-3

ER -