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

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...

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Published in:arXiv.org 2017-01
Main Authors: Hidaka, Hiroyuki, Shimizu, Yusei, Yamazaki, Seigo, Miura, Naoyuki, Nagata, Ryoma, Tabata, Chihiro, Mombetsu, Shota, Yanagisawa, Tatsuya, Amitsuka, Hiroshi
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Language:English
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Crystal structure
Crystallinity
Dependence
Electrons
Phonons
Scattering
Single crystals
Superconductivity
Transition temperature
Transport properties
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creator Hidaka, Hiroyuki
Shimizu, Yusei
Yamazaki, Seigo
Miura, Naoyuki
Nagata, Ryoma
Tabata, Chihiro
Mombetsu, Shota
Yanagisawa, Tatsuya
Amitsuka, Hiroshi
description 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.
doi_str_mv 10.48550/arxiv.1701.04539
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subjects Crystal structure
Crystallinity
Dependence
Electrons
Phonons
Scattering
Single crystals
Superconductivity
Transition temperature
Transport properties
title Observation of Low-Energy Einstein Phonon and Superconductivity in Single-Crystalline LaBe\(_{13}\)
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