Browsing by Author "Gao, Fei"

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    Strange-metal behavior without fine tuning in PrV2⁢Al20
    (American Physical Society, 2024) Lenk, Marvin; Gao, Fei; Kroha, Johann; Nevidomskyy, Andriy H.
    Strange-metal behavior observed in the praseodymium-based heavy-fermion material PrV2⁢Al20 has been tentatively interpreted in the framework of proximity to a quantum critical point (QCP) associated with quadrupolar ordering. Here, we demonstrate that an alternative, natural explanation exists without invoking a QCP, in terms of the unconventional nature of the quadrupolar Kondo effect taking place in non-Kramers ions. Using a combination of ab initio density-functional theory calculations and analytical arguments, we construct a periodic Anderson model with realistic parameters to describe PrV2⁢Al20. We solve the model using dynamical mean-field theory preserving the model symmetries and demonstrate the non-Fermi liquid strange-metal behavior stemming from the two-channel nature of the quadrupolar Kondo effect. Our calculations provide an explanation for the puzzling temperature dependence in the magnetic susceptibility and provide a basis for analyzing future photoemission experiments.