2002/03/22 by David E. Logan, Nigel L Dickens, Nigel L. Dickens · 3 citations
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Rare-earth and actinide compounds #cond-mat.str-el
paper · pdf · doi:10.1088/0953-8984/14/13/318
published as J. Phys.: Condens. Matter 14 (2002) 3605
openalex publication_date 2002/03/22 · arxiv created 2002/04/11 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
The recently introduced local moment approach (LMA) is extended to encompass single-particle dynamics and transport properties of the Anderson impurity model at finite temperature, T . While it is applicable to arbitrary interaction strengths, primary emphasis is given to the strongly correlated Kondo regime (characterized by the T = 0 Kondo scale ω K ). In particular the resultant universal scaling behaviour of the single-particle spectrum D (ω; T )≡ F (ω/ω K ; T /ω K ) within the LMA is obtained in closed form; leading to an analytical description of the thermal destruction of the Kondo resonance on all energy scales. Transport properties follow directly from a knowledge of D (ω; T ). The ( T /ω K )-dependence of the resulting resistivity ρ( T ), which is found to agree rather well with numerical renormalization group calculations, is shown to be asymptotically exact at high temperatures; to concur well with the Hamann approximation for the s-d model down to T /ω K ~1, and to cross over smoothly to the Fermi liquid form ρ( T )-ρ(0)∝-( T /ω K ) 2 in the low-temperature limit. The underlying approach, while naturally approximate, is moreover applicable to a broad range of quantum impurity and related models.