Quantum Critical Point in the Sc-Doped Itinerant Antiferromagnet TiAu

Published

June 14, 2017

Author(s)

E. Svanidze, T. Besara, J. K. Wang, D. Geiger, L. Prochaska, J. M. Santiago, Jeffrey W. Lynn, S. Paschen, E. Morosan

Abstract

We present the first experimental realization of a quantum critical point in an itinerant antiferromagnetic realization of a quantum critical point in an intinerant antiferromagnet composed of non-magnetic constituents, TiAu. By partially substituting Ti with Sc in Ti_1-xSc_xAu, a doping amount of x_c=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 p ∝ T and specific heat C_p/T ∝ - lnT, characteristic of a 2D antiferromagnet. The quantum critical point is accompanied by an enhancement of the spin fluctuations, as indicated by the diverging Sommerfeld coefficient γ at x=x_c.

Citation

Physical Review B

Volume

95

Issue

22

Pub Type

Journals

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Keywords

Itinerant Antiferromagnet, Quantum Critical Point, Non-Fermi Liquid, resistivity, specific heat

Citation

Svanidze, E. , Besara, T. , Wang, J. , Geiger, D. , Prochaska, L. , Santiago, J. , Lynn, J. , Paschen, S. and Morosan, E. (2017), Quantum Critical Point in the Sc-Doped Itinerant Antiferromagnet TiAu, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=921033 (Accessed October 8, 2025)