The modulated spin liquid: a new paradigm for URu$_2$Si$_2$

Details The modulated spin liquid: a new paradigm for URu$_2$Si$_2$ The modulated spin liquid: a new paradigm for URu$_2$Si$_2$

2010-10-06

arxiv.org/abs/1010.1237v2

Phys.Rev.Lett.106:106601,2011

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.106.106601

We argue that near a Kondo breakdown critical point, a spin liquid with spatial modulations can form. Unlike its uniform counterpart, we find that this occurs via a second order phase transition. The amount of entropy quenched when ordering is of the same magnitude as for an antiferromagnet. Moreover, the two states are competitive, and at low temperatures are separated by a first order phase transition. The modulated spin liquid we find breaks $Z_4$ symmetry, as recently seen in the hidden order phase of URu$_2$Si$_2$. Based on this, we suggest that the modulated spin liquid is a viable candidate for this unique phase of matter.

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