Missing superconductivity in BaAlSi with the AlB2 type structure

Shoji Yamanaka; Teruyoshi Otsuki; Takayuki Ide; Hiroshi Fukuoka; Ryotaro Kumashiro; Takeshi Rachi; Katsumi Tanigaki; Fang Zhun Guo; Keisuke Kobayashi

doi:10.1016/j.physc.2006.10.002

Missing superconductivity in BaAlSi with the AlB₂ type structure

Shoji Yamanaka, Teruyoshi Otsuki, Takayuki Ide, Hiroshi Fukuoka, Ryotaro Kumashiro, Takeshi Rachi, Katsumi Tanigaki, Fang Zhun Guo, Keisuke Kobayashi

Research output: Contribution to journal › Article

22 Citations (Scopus)

Abstract

The solid solutions BaAl_1-xSi_1+x (0 ≤ x ≤ 0.5) were prepared. The compound with the stoichiometric composition (x = 0) did not show superconductivity as reported by other investigators, but the solid solutions with x > 0 became superconductors with a transition temperature T_c = 2.8 K. The comparison of the lattice parameters with those of the other isotypic ternary superconductors MAlSi (M = Ca, Sr) suggested that the superconductivity could be related to the lattice parameter within the (AlSi) plane rather than the interlayer spacing. The band structures near the Fermi level of MAlSi (M = Ca, Sr, Ba) were measured using soft X-ray photoelectron spectroscopy, which were in good agreement with the calculated ones, confirming that the contribution of the d orbitals of the alkaline-earth metals were predominant in the conduction bands.

Original language	English
Pages (from-to)	19-23
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	451
Issue number	1
DOIs	https://doi.org/10.1016/j.physc.2006.10.002
Publication status	Published - 2007 Jan 1

Keywords

AlB type structure
BaAlSi
CaAlSi
SrAlSi
Superconductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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Yamanaka, S., Otsuki, T., Ide, T., Fukuoka, H., Kumashiro, R., Rachi, T., Tanigaki, K., Guo, F. Z., & Kobayashi, K. (2007). Missing superconductivity in BaAlSi with the AlB₂ type structure. Physica C: Superconductivity and its applications, 451(1), 19-23. https://doi.org/10.1016/j.physc.2006.10.002

Missing superconductivity in BaAlSi with the AlB₂ type structure. / Yamanaka, Shoji; Otsuki, Teruyoshi; Ide, Takayuki; Fukuoka, Hiroshi; Kumashiro, Ryotaro; Rachi, Takeshi; Tanigaki, Katsumi; Guo, Fang Zhun; Kobayashi, Keisuke.

In: Physica C: Superconductivity and its applications, Vol. 451, No. 1, 01.01.2007, p. 19-23.

Research output: Contribution to journal › Article

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abstract = "The solid solutions BaAl1-xSi1+x (0 ≤ x ≤ 0.5) were prepared. The compound with the stoichiometric composition (x = 0) did not show superconductivity as reported by other investigators, but the solid solutions with x > 0 became superconductors with a transition temperature Tc = 2.8 K. The comparison of the lattice parameters with those of the other isotypic ternary superconductors MAlSi (M = Ca, Sr) suggested that the superconductivity could be related to the lattice parameter within the (AlSi) plane rather than the interlayer spacing. The band structures near the Fermi level of MAlSi (M = Ca, Sr, Ba) were measured using soft X-ray photoelectron spectroscopy, which were in good agreement with the calculated ones, confirming that the contribution of the d orbitals of the alkaline-earth metals were predominant in the conduction bands.",

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AU - Rachi, Takeshi

AU - Tanigaki, Katsumi

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AB - The solid solutions BaAl1-xSi1+x (0 ≤ x ≤ 0.5) were prepared. The compound with the stoichiometric composition (x = 0) did not show superconductivity as reported by other investigators, but the solid solutions with x > 0 became superconductors with a transition temperature Tc = 2.8 K. The comparison of the lattice parameters with those of the other isotypic ternary superconductors MAlSi (M = Ca, Sr) suggested that the superconductivity could be related to the lattice parameter within the (AlSi) plane rather than the interlayer spacing. The band structures near the Fermi level of MAlSi (M = Ca, Sr, Ba) were measured using soft X-ray photoelectron spectroscopy, which were in good agreement with the calculated ones, confirming that the contribution of the d orbitals of the alkaline-earth metals were predominant in the conduction bands.

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