Quantum critical point in the Sc-doped itinerant antiferromagnet TiAu
Date
2017
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American Physical Society
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 Ti 1 − x Sc x Au , 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 ρ ∝ T and specific heat C p / T ∝ − ln T , 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
x c .
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Svanidze, E., Besara, T., Wang, J.K., et al.. "Quantum critical point in the Sc-doped itinerant antiferromagnet TiAu." Physical Review B, 95, no. 22 (2017) American Physical Society: https://doi.org/10.1103/PhysRevB.95.220405.
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