2025/03/12 by Kitatani, M., Schäfer, T., Katanin, A. A. +2
#FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el)
paper · doi:10.48550/arxiv.2503.09529
We study quantum criticality in the doped two-dimensional periodic Anderson model with the hybridization acting as a tuning parameter. Employing the dynamical vertex approximation we find two distinct quantum critical behaviors. One is a quantum critical point between the antiferromagnetically ordered and the Kondo state, both metallic with itinerant f electrons. Here, we obtained the critical exponent γ≈ 1 for the temperature dependence of the antiferromagnetic susceptibility. We observe a second quantum critical behavior with γ=2 above the continuing zero-temperature magnetic order, at a quantum critical point where the f electrons turn from localized to itinerant.