Cited time in webofscience Cited time in scopus

Optical Evidence of Itinerant- Localized Crossover of 4f Electrons in Cerium Compounds

Title
Optical Evidence of Itinerant- Localized Crossover of 4f Electrons in Cerium Compounds
Author(s)
Kimura, Shin-ichiKwon, Yong SeungMatsumoto, YujiAoki, HaruyoshiSakai, Osamu
Issued Date
2016-08-15
Citation
Journal of the Physical Society of Japan, v.85, no.8
Type
Article
Keywords
MODELSYSTemS
ISSN
0031-9015
Abstract
Cerium (Ce)-based heavy-fermion materials have a characteristic double-peak structure (mid-IR peak) in the optical conductivity [σ(ω)] spectra originating from the strong conduction (c)-f electron hybridization. To clarify the behavior of the mid-IR peak at a low c-f hybridization strength, we compared the σ(ω) spectra of the isostructural antiferromagnetic and heavy-fermion Ce compounds with the calculated unoccupied density of states and the spectra obtained from the impurity Anderson model. With decreasing c-f hybridization intensity, the mid-IR peak shifts to the low-energy side owing to the renormalization of the unoccupied 4f state, but suddenly shifts to the high-energy side owing to the f-f on-site Coulomb interaction at a slight localized side from the quantum critical point (QCP). This finding gives us information on the change in the electronic structure across QCP. © 2016 The Physical Society of Japan.
URI
http://hdl.handle.net/20.500.11750/5084
DOI
10.7566/JPSJ.85.083702
Publisher
Physical Society of Japan
Related Researcher
  • 권용성 Kwon, Yong Seung
  • Research Interests High Tc Superconductors and magnetic materials; Thermoelectric Materials
Files in This Item:

There are no files associated with this item.

Appears in Collections:
Department of Physics and Chemistry Quantum Functional Materials Laboratory 1. Journal Articles

qrcode

  • twitter
  • facebook
  • mendeley

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE