Evolution of critical scaling behavior near a ferromagnetic quantum phase transition

Details Evolution of critical scaling behavior near a ferromagnetic quantum phase transition Evolution of critical scaling behavior near a ferromagnetic quantum phase transition

2009-08-12

arxiv.org/abs/0908.1809v1

Phys. Rev. Lett. 103, 076404 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pgs, 3 figs

Scientific paper

10.1103/PhysRevLett.103.076404

Magnetic critical scaling in URu2-xRexSi2 single crystals continuously evolves as the ferromagnetic critical temperature is tuned towards zero via chemical substitution. As the quantum phase transition is approached, the critical exponents gamma and (delta-1) decrease to zero in tandem with the critical temperature and ordered moment, while the exponent beta remains constant. This novel trend distinguishes URu2-xRexSi2 from stoichiometric quantum critical ferromagnets and appears to reflect an underlying competition between Kondo and ferromagnetic interactions.

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