Thermodynamic scaling theory for the two-impurity anderson model

Jayaprakash, C. ; Krishnamurthy, H. R. ; Wilkins, J. W. (1982) Thermodynamic scaling theory for the two-impurity anderson model Journal of Applied Physics, 53 (3). pp. 2142-2144. ISSN 0021-8979

Full text not available from this repository.

Official URL:

Related URL:


We present results of a study of the two-impurity Anderson model using a thermodynamic scaling theory developed recently. The model is characterized by the Coulomb energy U, the orbital energy εd, the d-level width Γ, and the separation between impurities R. If Γ«-εd«U, the low-temperature physics maps onto that of the two-impurity Kondo problem, discussed by us elsewhere; the main difference is that the RKKY interaction can acquire an antiferromagnetic contribution with a (kFR)-2 envelope over a restricted range of kFR. In this case impurity-impurity interactions can be substantial. The other interesting case is when the impurities have a "fluctuating valence" with the singlet lying lower in energy, i.e., εd~Γ. Here we find that the single-impurity physics dominates the low-temperature behavior, and impurity-impurity interactions are perturbative. The qualitative features of the temperature-dependent susceptibility are discussed.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
ID Code:17621
Deposited On:16 Nov 2010 12:58
Last Modified:06 Jun 2011 07:10

Repository Staff Only: item control page