Search for a quantum phase transition in U(Pt_(1-x)Pd_x)_3

Details Search for a quantum phase transition in U(Pt_(1-x)Pd_x)_3 Search for a quantum phase transition in U(Pt_(1-x)Pd_x)_3

1999-08-26

arxiv.org/abs/cond-mat/9908380v1

Physica B 284-288 (2000), 1281-1282

Physics

Condensed Matter

Strongly Correlated Electrons

2 pages, proceedings of LT22

Scientific paper

10.1016/S0921-4526(99)02553-3

Pd in U(Pt_{1-x}Pd_x)_3 suppresses the superconducting T_c to 0 K at critical concentration x_c of 0.007 and induces a conventional AFM state for x > x_c. The resistivity below 1 K shows a deviation from Fermi liquid behavior described by a power law where the exponent ranges from 2 at x=0 to 1.6 for x = x_c. This suggests that a quantum phase transition (QPT) may exist near x_c associated with either the magnetic or superconducting transition temperature = 0 K. Transport for a sample with x = 0.004 < x_c has constant exponent of 1.77 as increasing pressure suppresses T_c to 0 K, suggesting that if a QPT exists it may be associated with the magnetic transition.

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