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Coupled s-wave and d-wave states in the heavy-fermion superconductor U1−xThxBe13

A. Langner, D. Sahu, Thomas F. George

DOI 10.1103/PhysRevB.38.9187 · Physical Review B

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Abstract

In the heavy-fermion superconductor U1−xThxBe13, superconducting states coexist for thorium concentrations 0≤x≤0.06. Assuming s-wave and d-wave symmetries for these states, we derive a Ginzburg-Landau free-energy expression which couples s- and d-wave states and is rotationally invariant, in contrast to the free-energy expression proposed by P. Kumar and P. Wölfle Phys. Rev. Lett. 59 1954 1987. We discuss in detail the consequences that follow from our free-energy relation. In particular, we predict that in the above system there are two eigenfrequencies associated with the dynamics of phase oscillations (internal Josephson effect) which are characteristic of the s-wave and d-wave states.

Source-reported materials — not catalogue approval

FormulaReported Tc (K)Pressure (GPa)Type
U1-xThxBe13

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0.87Pressure not reportedonset
U1-xThxBe13

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Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.

0.55Pressure not reportedzero_resistance
UBe13

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Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.

0.87Pressure not reportedonset
UBe13

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0.55Pressure not reportedzero_resistance
YBa2Cu3O7

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—Pressure not reportedunknown

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