Intermediate Valence to Heavy Fermion Through a Quantum Phase Transition in Yb₃(Rh₁₋xTx)₄ Ge₁₃ (T = Co, Ir) Single Crystals

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Intermediate Valence to Heavy Fermion Through a Quantum Phase Transition in Yb₃(Rh₁₋xTx)₄ Ge₁₃ (T = Co, Ir) Single Crystals

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Title: Intermediate Valence to Heavy Fermion Through a Quantum Phase Transition in Yb₃(Rh₁₋xTx)₄ Ge₁₃ (T = Co, Ir) Single Crystals
Author(s):
Rai, Binod K.;
Oswald, Iain W. H. (UT Dallas);
Chan, Julia Y. (UT Dallas);
Morosan, E.
Item Type: Article
Keywords: Show Keywords
Abstract: Single crystals of Yb₃(Rh₁₋xTx)₄ Ge₁₃ (T = Co, Ir) have been grown using the self-flux method. Powder x-ray diffraction data on these compounds are consistent with the cubic structure with space group Pm3̅n. Intermediate-valence behavior is observed in Yb₃(Rh₁₋xTx)₄ Ge₁₃ upon T = Co doping, while T = Ir doping drives the system into a heavy-fermion state. Antiferromagnetic order is observed in the Ir-doped samples Yb₃(Rh₁₋xTx)₄ Ge₁₃ for 0.5 < x ≤ 1 with T_N = 0.96 K for Yb₃Ir₄Ge₁₃. With decreasing x, the magnetic order is suppressed towards a quantum critical point around x_c = 0.5, accompanied by non-Fermi-liquid behavior evidenced by logarithmic divergence of the specific heat and linear temperature dependence of the resistivity. The Fermi-liquid behavior is recovered with the application of large magnetic fields.
Publisher: Amer Physical Soc
ISSN: 1098-0121
Persistent Link: http://hdl.handle.net/10735.1/4961
http://dx.doi.org/10.1103/PhysRevB.93.035101
Bibliographic Citation: Rai, Binod K., Iain W. H. Oswald, Julia Y. Chan, and E. Morosan. 2016. "Intermediate valence to heavy fermion through a quantum phase transition in Yb₃(Rh₁₋xTx)₄ Ge₁₃ (T = Co, Ir) single crystals." Physical Review B 93(3): 035101-035101.
Terms of Use: ©2016 American Physical Society
Sponsors: Gordon and Betty Moore Foundation grant (GBMF4417); National Science Foundation (DMR-1360863)

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