論文

査読有り
2017年9月

Observation of momentum-dependent charge excitations in hole-doped cuprates using resonant inelastic x-ray scattering at the oxygen K edge

PHYSICAL REVIEW B
  • Kenji Ishii
  • ,
  • Takami Tohyama
  • ,
  • Shun Asano
  • ,
  • Kentaro Sato
  • ,
  • Masaki Fujita
  • ,
  • Shuichi Wakimoto
  • ,
  • Kenji Tustsui
  • ,
  • Shigetoshi Sota
  • ,
  • Jun Miyawaki
  • ,
  • Hideharu Niwa
  • ,
  • Yoshihisa Harada
  • ,
  • Jonathan Pelliciari
  • ,
  • Yaobo Huang
  • ,
  • Thorsten Schmitt
  • ,
  • Yoshiya Yamamoto
  • ,
  • Jun'ichiro Mizuki

96
11
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevB.96.115148
出版者・発行元
AMER PHYSICAL SOC

We investigate electronic excitations in La2-x (Br, Sr)(x) CuO4 using resonant inelastic x-ray scattering (RIXS) at the oxygen K edge. RIXS spectra of the hole-doped cuprates show clear momentum dependence below 1 eV. The broad spectral weight exhibits positive dispersion and shifts to higher energy with increasing hole concentration. Theoretical calculation of the dynamical charge structure factor on oxygen orbitals in a three-band Hubbard model is consistent with the experimental observation of the momentum and doping dependence, and therefore the momentum-dependent spectral weight is ascribed to intraband charge excitations which have been observed in electron-doped cuprates. Our results confirm that the momentum-dependent charge excitations exist on the order of the transfer energy (t), and the broad spectral line shape indicates damped and incoherent character of the charge excitations at the energy range in the doped Mott insulators.

Web of Science ® 被引用回数 : 11

リンク情報
DOI
https://doi.org/10.1103/PhysRevB.96.115148
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000411454400003&DestApp=WOS_CPL