Anderson's impurity-model analysis on CeO1-xFxBiS2

International Conference on Strongly Correlated Electron Systems 2014

Sugimoto, Takuya^1 ; Joseph, Boby^2 ; Paris, Eugenio^2 ; Iadecola, Antonella^3 ; Demura, Satoshi^5,6 ; Mizuguchi, Yoshikazu^7 ; Takano, Yoshihiko^5,6 ; Mizokawa, Takashi^1,2,4 ; Saini, Naurang L.^2

Department of Complexity Science and Engineering, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa

277-8561, Japan^1

Dipartimento di Fisica, Universitá di Roma la Sapienza, Piazzale Aldo Moro 2, Rome

00185, Italy^2

Elettra-Sincrotrone SCpAss, 14-km 163.5, Basovizza, Trieste

34149, Italy^3

Department of Physics, University of Tokyo, 5-1-5 Kashiwanoha, Chiba

277-8561, Japan^4

National Institute for Materials Science, 1-2-1 Sengen, Tsukuba

305-0047, Japan^5

Graduate School of Pure and Applied Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba

305-8577, Japan^6

Department of Electrical and Electronic Engineering, Tokyo Metropolitan University, 1-1 Minami-osawa, Hachioji

192-0397, Japan^7

关键词: Andersons;    F-doping;    Impurity model;    Kondo regime;    Structural parameter;    Transfer integral;    Valence fluctuations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012073/pdf
DOI  :  10.1088/1742-6596/592/1/012073

来源: IOP

【 摘 要 】

We have investigated the impact of F-doing on CeO1-xFxBiS2in terms of the electronic-structural parameters of Anderson's impurity-model analysis. It was recently reported using Ce L3-edge x-ray absorption spectroscopy (XAS) that CeOBiS2falls in the Ce valence fluctuation regime and the F-doping drives the system into the Kondo regime. The Ce L3- edge XAS spectra with the various F-doping levels can be reproduced by adjusting the transfer integral in the Anderson's impurity model. The present analysis indicates that the F-doping to the system corresponds to the decrease of the Ce-Bi transfer integral.