Papers

Peer-reviewed
Nov, 2010

Effect of Disorder on Fermi Surface in Heavy Electron Systems

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
  • Junya Otsuki
  • ,
  • Hiroaki Kusunose
  • ,
  • Yoshio Kuramoto

Volume
79
Number
11
First page
114709
Last page
Language
English
Publishing type
Research paper (scientific journal)
DOI
10.1143/JPSJ.79.114709
Publisher
PHYSICAL SOC JAPAN

The Kondo lattice model with substitutional disorder is studied with attention to the size of the Fermi surface and the associated Dingle temperature. The model serves for understanding heavy-fermion Ce compounds alloyed with La according to substitution CexLa1-x. The Fermi surface is identified from the steepest change of the momentum distribution of conduction electrons, and is derived at low enough temperature by the dynamical mean-field theory (DMFT) combined with the coherent potential approximation (CPA). The Fermi surface without magnetic field increases in size with decreasing x from x = 1 (Ce end), and disappears at such x that gives the same number of localized spins as that of conduction electrons. From the opposite limit of x = 0 (La end), the Fermi surface broadens quickly as x increases, but stays at the same position as that of the La end. With increasing magnetic field, a metamagnetic transition occurs, and the Fermi surface above the critical field changes continuously across the whole range of x. The Dingle temperature takes a maximum around x = 0.5. Implication of the results to experimental observation is discussed.

Link information
DOI
https://doi.org/10.1143/JPSJ.79.114709
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000283514600017&DestApp=WOS_CPL
ID information
  • DOI : 10.1143/JPSJ.79.114709
  • ISSN : 0031-9015
  • Web of Science ID : WOS:000283514600017

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