Observation of low-energy Einstein phonon and superconductivity in single-crystalline LaBe13

Hiroyuki Hidaka, Yusei Shimizu, Seigo Yamazaki, Naoyuki Miura, Ryoma Nagata, Chihiro Tabata, Shota Mombetsu, Tatsuya Yanagisawa, Hiroshi Amitsuka

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Abstract

The thermal and electrical transport properties of single-crystalline LaBe13 have been investigated by specific-heat (C) and electrical-resistivity (ρ) 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 LaBe13 has a low-energy Einstein-like-phonon mode with a characteristic temperature of ∼177 K. In addition, a superconducting transition was observed in the ρ 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 T3 dependence was found in ρ(T) below ∼50 K, in contrast to the behavior expected from the electron-electron scattering or the electron-Debye phonon scattering.

Original languageEnglish
Article number023704
Journaljournal of the physical society of japan
Volume86
Issue number2
DOIs
Publication statusPublished - 2017 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Hidaka, H., Shimizu, Y., Yamazaki, S., Miura, N., Nagata, R., Tabata, C., Mombetsu, S., Yanagisawa, T., & Amitsuka, H. (2017). Observation of low-energy Einstein phonon and superconductivity in single-crystalline LaBe13. journal of the physical society of japan, 86(2), [023704]. https://doi.org/10.7566/JPSJ.86.023704