Two-channel Kondo physics due to As vacancies in the layered compound ZrAs1.58Se0.39

Abstract

We address the origin of the magnetic-field independent -|A| T^{1/2} term observed in the low-temperature resistivity of several As-based metallic systems of the PbFCl structure type. For the layered compound ZrAs_{1.58}Se_{0.39}, we show that vacancies in the square nets of As give rise to the low-temperature transport anomaly over a wide temperature regime of almost two decades in temperature. This low-temperature behavior is in line with the non-magnetic version of the two-channel Kondo effect, whose origin we ascribe to a dynamic Jahn-Teller effect operating at the vacancy-carrying As layer with a C_4 symmetry. The pair-breaking nature of the dynamical defects in the square nets of As explains the low superconducting transition temperature T_{\rm{c}}\approx 0.14 K of ZrAs_{1.58}Se_{0.39}, as compared to the free-of-vacancies homologue ZrP_{1.54}S_{0.46} (T_{\rm{c}}\approx 3.7 K). Our findings should be relevant to a wide class of metals with disordered pnictogen layers.

arXiv comment17 pages, 8 figures; submitted

References in corpus (16)

• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Discovery of a Weyl Fermion semimetal state in NbAs
• Observation of the two-channel Kondo effect
• Dephasing in Metals by Two-Level Systems in the 2-Channel-Kondo Regime
• Orbital two-channel Kondo effect in epitaxial ferromagnetic L10-MnAl films
• Universal dephasing rate due to diluted Kondo impurities
• Kondo Temperature for the Two-Channel Kondo Models of Tunneling Centers
• Quasi-Kondo Phenomenon due to Dynamical Jahn-Teller Effect
• Observation of strong electron dephasing in disordered Cu${}_{93}$Ge${}_4$Au${}_3$ thin films
• Prospects for Non--Fermi--Liquid Behavior of a Two Level Impurity in a Metal
• Existence of two-channel Kondo regime for tunneling impurities with resonant scattering
• Transport properties and point contact spectra of Ni_xNb_{1-x} metallic glasses
• Two-Channel Kondo Physics from Tunnelling Impurities with Triangular Symmetry
• Crystallographic disorder and electron scattering on structural two-level systems in ZrAs1.4Se0.5
• Non-existence of strong coupling two-channel Kondo fixed point for microscopic models of tunneling centers
• Stable two-channel Kondo fixed point of an SU(3) quantum defect in a metal: renormalization group analysis and conductance spikes

Cited by in corpus (6)

• Oxygen vacancy-driven orbital multichannel Kondo effect in Dirac nodal line metals IrO2 and RuO2
• Tuning spin one channel to exotic orbital two-channel Kondo effect in ferrimagnetic composites of LaNiO3 and CoFe2O4
• Quantum Oscillations in the Anomalous Spin Density Wave State of FeAs
• Order parameter for the multichannel Kondo model at quantum criticality
• Electrical Transport of perpendicularly magnetized L10-MnGa and MnAl films
• Natural orbitals renormalization group approach to a spin-1/2 impurity interacting with two helical liquids