Superconductivity in Ba2/3Pt3B2 with the Kagome lattice

Sheng Li; Jie Xing; Jian Tao; Huan Yang; Hai Hu Wen

doi:10.1016/j.aop.2015.04.008

Superconductivity in Ba_2/3Pt₃B₂ with the Kagome lattice

Sheng Li, Jie Xing, Jian Tao, Huan Yang, Hai Hu Wen

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Resistivity, magnetization and low temperature specific heat (down to 0.4 K) of Ba_2/3Pt₃B₂ with the Kagome lattice of the transition metal Pt atoms have been investigated. The magnetization hysteresis loops measured on the sample indicate that it belongs to a type-II superconductor. The specific heat exhibits δC/γnT|Tc≈1.7, showing a moderate coupling superconductivity. Furthermore, the magnetic field dependence of the electronic specific heat coefficient in the low temperature limit demonstrates a linear relation γ_e∝H, suggesting an s-wave gap. Surprisingly, the Wilson ratio determined here is about 34, which may be explained by short range magnetic correlation. Compared with the compound LaRu₃Si₂, we intend to attribute the extraordinarily large Wilson ratio to the deficiency of Ba atoms. Further theoretical and experimental efforts are required to clarify this issue.

Original language	English
Pages (from-to)	248-254
Number of pages	7
Journal	Annals of Physics
Volume	358
DOIs	https://doi.org/10.1016/j.aop.2015.04.008
State	Published - Jul 1 2015
Externally published	Yes

Funding

This work was supported by National Natural Science Foundation (NSF) of China, the Ministry of Science and Technology of China (973 projects: 2011CBA00102, 2012CB821403, 2010CB923002) and Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) .

Funders	Funder number
National Science Foundation
National Natural Science Foundation of China
Ministry of Science and Technology of the People's Republic of China	2011CBA00102, 2010CB923002, 2012CB821403
Priority Academic Program Development of Jiangsu Higher Education Institutions

Keywords

Kagome lattice
Superconductivity
Wilson ratio

Access to Document

10.1016/j.aop.2015.04.008

Cite this

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title = "Superconductivity in Ba2/3Pt3B2 with the Kagome lattice",

abstract = "Resistivity, magnetization and low temperature specific heat (down to 0.4 K) of Ba2/3Pt3B2 with the Kagome lattice of the transition metal Pt atoms have been investigated. The magnetization hysteresis loops measured on the sample indicate that it belongs to a type-II superconductor. The specific heat exhibits δC/γnT|Tc≈1.7, showing a moderate coupling superconductivity. Furthermore, the magnetic field dependence of the electronic specific heat coefficient in the low temperature limit demonstrates a linear relation γe∝H, suggesting an s-wave gap. Surprisingly, the Wilson ratio determined here is about 34, which may be explained by short range magnetic correlation. Compared with the compound LaRu3Si2, we intend to attribute the extraordinarily large Wilson ratio to the deficiency of Ba atoms. Further theoretical and experimental efforts are required to clarify this issue.",

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T1 - Superconductivity in Ba2/3Pt3B2 with the Kagome lattice

AU - Li, Sheng

AU - Xing, Jie

AU - Tao, Jian

AU - Yang, Huan

AU - Wen, Hai Hu

PY - 2015/7/1

Y1 - 2015/7/1

N2 - Resistivity, magnetization and low temperature specific heat (down to 0.4 K) of Ba2/3Pt3B2 with the Kagome lattice of the transition metal Pt atoms have been investigated. The magnetization hysteresis loops measured on the sample indicate that it belongs to a type-II superconductor. The specific heat exhibits δC/γnT|Tc≈1.7, showing a moderate coupling superconductivity. Furthermore, the magnetic field dependence of the electronic specific heat coefficient in the low temperature limit demonstrates a linear relation γe∝H, suggesting an s-wave gap. Surprisingly, the Wilson ratio determined here is about 34, which may be explained by short range magnetic correlation. Compared with the compound LaRu3Si2, we intend to attribute the extraordinarily large Wilson ratio to the deficiency of Ba atoms. Further theoretical and experimental efforts are required to clarify this issue.

AB - Resistivity, magnetization and low temperature specific heat (down to 0.4 K) of Ba2/3Pt3B2 with the Kagome lattice of the transition metal Pt atoms have been investigated. The magnetization hysteresis loops measured on the sample indicate that it belongs to a type-II superconductor. The specific heat exhibits δC/γnT|Tc≈1.7, showing a moderate coupling superconductivity. Furthermore, the magnetic field dependence of the electronic specific heat coefficient in the low temperature limit demonstrates a linear relation γe∝H, suggesting an s-wave gap. Surprisingly, the Wilson ratio determined here is about 34, which may be explained by short range magnetic correlation. Compared with the compound LaRu3Si2, we intend to attribute the extraordinarily large Wilson ratio to the deficiency of Ba atoms. Further theoretical and experimental efforts are required to clarify this issue.

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