Anisotropic inelastic scattering and its interplay with superconductivity in URu$_{2}$Si$_{2}$

Details Anisotropic inelastic scattering and its interplay with superconductivity in URu$_{2}$Si$_{2}$ Anisotropic inelastic scattering and its interplay with superconductivity in URu$_{2}$Si$_{2}$

2009-07-06

arxiv.org/abs/0907.0967v1

Phys. Rev. B 80, 172501 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures, 1 table

Scientific paper

10.1103/PhysRevB.80.172501

In contrast to almost all anisotropic superconductors, the upper critical field of URu$_{2}$Si$_{2}$ is larger when the field is oriented along the less conducting direction. We present a study of resistivity and Seebeck coefficient extended down to sub-Kelvin temperature range uncovering a singular case of anisotropy. When the current is injected along the c-axis URu$_{2}$Si$_{2}$ behaves as a low-density Fermi liquid. When it flows along the a-axis, even in presence of a large field, resistivity remains T-linear down to T$_{c}$ and the Seebeck coefficient undergoes a sign change at very low temperatures. We conclude that the characteristic energy scale is anisotropic and vanishingly small in the basal plane.

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