Title

Quantum critical point in the Sc-doped itinerant antiferromagnet TiAu

Abstract

We present an experimental realization of a quantum critical point in an itinerant antiferromagnet composed of nonmagnetic constituents, TiAu. By partially substituting Ti with Sc in Ti1−xScxAu, a doping amount of xc=0.13±0.01 induces a quantum critical point with minimal disorder effects. The accompanying non-Fermi liquid behavior is observed in both the resistivity ρ∝ and specific heat Cp/T∝−lnT, characteristic of a two-dimensional antiferromagnet. The quantum critical point is accompanied by an enhancement of the spin fluctuations, as indicated by the diverging Sommerfeld coefficient γ at x=xc.

Document Type

Article

DOI

https://doi.org/10.1103/physrevb.95.220405

Rights Information

© 2017 American Physical Society

Keywords

antiferromagnetism, quantum criticality, quantum phase transitions, spin density waves, physical systems, disordered systems, condensed matter amd materials physics

Publication Date

2017

Journal Title

Physical Review B

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