Dual nature of 3d electrons in YbT2Zn20 (T = Co; Fe) evidenced by electron spin resonance

International Conference on Strongly Correlated Electron Systems 2014

Ivanshin, V.A.^1 ; Litvinova, T.O.^1 ; Gimranova, K.^1 ; Sukhanov, A.A.^2 ; Jia, S.^3 ; Bud'Ko, S.L.^3 ; Canfield, P.C.^3

Kazan (Volga Region) Federal University, Kremlevskaya str. 18, Kazan

420008, Russia^1

Zavoisky Physical-Technical Institute, Sibirsky trakt 10/7, Kazan

420029, Russia^2

Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames

IA

50011, United States^3

关键词: 3d electron;    Electronic band structure calculation;    ESR spectra;    Heavy fermion systems;    Quantum criticality;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012084/pdf
DOI  :  10.1088/1742-6596/592/1/012084

来源: IOP

【 摘 要 】

The electron spin resonance experiments were carried out in the single crystals YbFe2Zn20. The observed spin dynamics is compared with that in YbCo2Zn20and Yb2Co12P7as well as with the data of inelastic neutron scattering and electronic band structure calculations. Our results provide direct evidence that 3d electrons are itinerant in YbFe2Zn20and localized in YbCo2Zn20. Possible connection between spin paramagnetism of dense heavy fermion systems, quantum criticality effects, and ESR spectra is discussed.