Electron-phonon coupling in UBe13: Absence of conventional superconductivity

W. E. Pickett; H. Krakauer; C. S. Wang

doi:10.1103/PhysRevB.34.6546

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Electron-phonon coupling in UBe13: Absence of conventional superconductivity

W. E. Pickett, H. Krakauer, C. S. Wang

DOI 10.1103/PhysRevB.34.6546 · Physical Review B

T1

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Abstract

Calculation of the electron-phonon interaction strength λep using the conventional theory for metals, which should be applicable in the normal regime, leads to the very small value of 0.035 for the heavy-fermion superconductor UBe13. It is argued that the interactions responsible for the large observed mass enhancement in the heavy-fermion regime will tend to further decrease λep, strengthening the conventional wisdom that either unconventional electron-phonon coupling or electronic interactions are responsible for pairing.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
UBe13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.9	Pressure not reported	unknown
UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.9	Pressure not reported	unknown
CeCu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.9	Pressure not reported	unknown
UBe13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown