Higher-Order Fermi-Liquid Corrections for an Anderson Impurity Away from Half Filling
File(s)
Published version
Author(s)
Oguri, Akira
Hewson, AC
Type
Journal Article
Abstract
We study the higher-order Fermi-liquid relations of Kondo systems for arbitrary impurity-electron fillings, extending the many-body quantum theoretical approach of Yamada and Yosida. It includes, partly, a microscopic clarification of the related achievements based on Nozières’ phenomenological description: Filippone, Moca, von Delft, and Mora [Phys. Rev. B 95, 165404 (2017)]. In our formulation, the Fermi-liquid parameters such as the quasiparticle energy, damping, and transport coefficients are related to each other through the total vertex Γσσ′;σ′σ(ω,ω′;ω′,ω), which may be regarded as a generalized Landau quasiparticle interaction. We obtain exactly this function up to linear order with respect to the frequencies ω and ω′ using the antisymmetry and analytic properties. The coefficients acquire additional contributions of three-body fluctuations away from half filling through the nonlinear susceptibilities. We also apply the formulation to nonequilibrium transport through a quantum dot, and clarify how the zero-bias peak evolves in a magnetic field.
Date Issued
2018-03-23
Date Acceptance
2017-12-20
Citation
Physical Review Letters, 2018, 120 (12)
ISSN
0031-9007
Publisher
American Physical Society
Journal / Book Title
Physical Review Letters
Volume
120
Issue
12
Copyright Statement
© 2018 American Physical Society
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000428167200019&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
PERTURBATION EXPANSION
QUANTUM-DOT
ZERO SOUND
MODEL
TRANSPORT
ALLOYS
Publication Status
Published
Article Number
126802
Date Publish Online
2018-03-23