Observation of Low-Energy Einstein Phonon and Superconductivity in Single-Crystalline LaBe${}_{13}$

Abstract

The thermal and electrical transport properties of single-crystalline LaBe${}_{13}$ have been investigated by specific-heat ($C$) and electrical-resistivity ($\rho$) measurements. The specific-heat measurements in a wide temperature range revealed the presence of a hump anomaly near 40 K in the $C$($T$)/$T$ curve, indicating that LaBe${}_{13}$ has a low-energy Einstein-like-phonon mode with a characteristic temperature of $\sim$ 177 K. In addition, a superconducting transition was observed in the $\rho$ measurements at the transition temperature of 0.53 K, which is higher than the value of 0.27 K reported previously by Bonville et al. Furthermore, an unusual $T^3$ dependence was found in $\rho$($T$) below $\sim$ 50 K, in contrast to the behavior expected from the electron--electron scattering or the electron--Debye phonon scattering.

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• Extremely strong-coupling superconductivity and anomalous lattice properties in the beta-pyrochlore oxide KOs2O6
• NMR relaxation and resistivity from rattling phonons in pyrochlore superconductors
• Transport properties of the heavy fermion superconductor PrOs${}_4$Sb${}_{12}$
• Magnetic-Field-Independent Ultrasonic Dispersions in the Magnetically Robust Heavy Fermion System SmOs4Sb12

Cited by in corpus (3)

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• Magnetically Ordered State and Crystalline-Electric-Field Effects in SmBe${}_{13}$
• Magnetic, Transport, and Phonon Properties of the Trivalent Eu Metallic Compound EuBe13