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Low-Carrier Density and Fragile Magnetism in a Kondo Lattice System



Binod K. Rai, Iain W. H. Oswald, Wenjing Ban, C.-L. Huang, V. Loganathan, A. M. Hallas, M. N. Wilson, G. M. Luke, Leland Harriger, Qingzhen Huang, Y. Li, Sami Dzsaber, Julia Y. Chan, N. L. Wang, Silke Paschen, Jeffrey W. Lynn, Andriy H. Nevidomskyy, Pengcheng Dai, Q. Si, E. Morosan


Known low carrier Kondo systems evolve from metallic non-magnetic analogues, while a recent theoretical model for the dilute carrier Kondo limit predicts semimetallic behavior. Very few 4f low carrier Kondo systems have been reported, mostly based on Ce. In this article, we report the low carrier Kondo Yb3Ir4Ge13 with a low carrier background as illustrated by the nonmagnetic analogue Lu3Ir4Ge^d13. Fragile magnetic state occurs in the Yb compound at very low temperatures, which, together with the semimetallic behavior, can be understood within the framework on the dilute-carrier limit of a Kondo lattice model. An entirely new regime of the Kondo effect is discovered, where the fragile magnetism can also be tuned in a non Fermi liquid fashion through Lu-forYb substitution.
Physical Review B


Kondo Effect, New Kondo Regime, Fragile Magnetism, Neutron Scattering, Susceptibility, Muon spectroscopy


Rai, B. , Oswald, I. , Ban, W. , Huang, C. , Loganathan, V. , Hallas, A. , Wilson, M. , Luke, G. , Harriger, L. , Huang, Q. , Li, Y. , Dzsaber, S. , Chan, J. , Wang, N. , Paschen, S. , Lynn, J. , Nevidomskyy, A. , Dai, P. , Si, Q. and Morosan, E. (2019), Low-Carrier Density and Fragile Magnetism in a Kondo Lattice System, Physical Review B, [online], (Accessed June 17, 2024)


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Created February 11, 2019, Updated October 12, 2021