Theory of "ferrisuperconductivity" in $U_{1-x}Th_xBe_{13}$

Details Theory of "ferrisuperconductivity" in $U_{1-x}Th_xBe_{13}$ Theory of "ferrisuperconductivity" in $U_{1-x}Th_xBe_{13}$

1999-07-08

arxiv.org/abs/cond-mat/9907108v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 eps figures, REVTeX

Scientific paper

10.1103/PhysRevLett.84.5872

We construct a two component Ginzburg-Landau theory with coherent pair motion and incoherent quasiparticles for the phase diagram of $U_{1-x}Th_xBe_{13}$. The two staggered superconducting states live at the Brillouin zone center and the zone boundary, and coexist for temperatures $T\le T_{c2}$ at concentrations $x_{c1}\approx 0.02\le x \le x_{c2}\approx 0.04$. We predict below $T_{c2}$ appearance of a charge density wave (CDW) and Be-sublattice distortion. The distortion explains the $\mu$SR relaxation anomaly, and Th-impurity mediated scattering of ultrasound to CDW fluctuations explains the attenuation peak.

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