Disorder-to-order transition in the magnetic and electronic properties of URh_2Ge_2

Details Disorder-to-order transition in the magnetic and electronic properties of URh_2Ge_2 Disorder-to-order transition in the magnetic and electronic properties of URh_2Ge_2

1999-12-22

arxiv.org/abs/cond-mat/9912403v1

Physics

Condensed Matter

Strongly Correlated Electrons

Phys. Rev. B, in print (scheduled 1 Mar 2000)

Scientific paper

10.1103/PhysRevB.61.8878

We present a study of annealing effects on the physical properties of tetragonal single--crystalline URh_2Ge_2. This system, which in as-grown form was recently established as the first metallic 3D random-bond heavy-fermion spin glass, is transformed by an annealing treatment into a long-range antiferromagnetically (AFM) ordered heavy-fermion compound. The transport properties, which in the as-grown material were dominated by the structural disorder, exhibit in the annealed material signs of typical metallic behavior along the crystallographic a axis. From our study URh_2Ge_2 emerges as exemplary material highlighting the role and relevance of structural disorder for the properties of strongly correlated electron systems. We discuss the link between the magnetic and electronic behavior and how they are affected by the structural disorder.

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