Superconductivity and physical properties of Ba24Si100 determined from electric transport, specific-heat capacity, and magnetic susceptibility measurements
Takeshi Rachi, Harukazu Yoshino, Ryotaro Kumashiro, Masaki Kitajima, Kensuke Kobayashi, Keiichi Yokogawa, Keizo Murata, Noriaki Kimura, Haruyoshi Aoki, Hiroshi Fukuoka, Syoji Yamanaka, Hidekazu Shimotani, Taishi Takenobu, Yoshihiro Iwasa, Takahiko Sasaki, Norio Kobayashi, Yuji Miyazaki, Kazuya Saito, FangZhun Guo, Keisuke Kobayashi, Keiichi Osaka, Kenichi Kato, Masaki Takata, Katsumi Tanigaki
DOI 10.1103/PhysRevB.72.144504 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Both Ba24Si100 and Ba24Ge100 with crystallographically identical structure are found to be superconducting at 1.4 and 0.27 K, respectively. Physical properties of this superconductor Ba24Si100 are studied by electric transport, specific heat capacity, and magnetic susceptibility measurements. The density of states at the Fermi level NEF=0.148 states eV−1(Siatom)−1 and a distinct jump of Cp at the superconducting transition temperature ΔCp=0.272JK−1mol−1 are obtained. An exponential fit of Cp below the superconducting states gives an energy gap 2Δ=0.423meV and shows that this is a superconductor having s-wave character or isotropic energy gap. On the basis of our experimental data other important physical parameters are also derived.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba24Si100 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.4 | Pressure not reported | onset |
| Ba24Si100 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.4 | Pressure not reported | onset |
| Ba24Si100 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.4 | Pressure not reported | onset |
| Ba24Ge100 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.27 | Pressure not reported | unknown |
| Ba24Ge100 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.8 | 2.7 GPa | unknown |
| Ba24Ge100 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.2 | 1.5 GPa | onset |
| Na2Ba6Si46 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ba8Si46 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Electron-Phonon Interactions of Si100 and Ge100 Superconductors with Ba Atoms Inside
similarity 0.94Jun Tang et al.
Source status unknown — claims are unverified
High-pressure synthesis and superconductivity of LaGe5 containing a tunnel germanium network
similarity 0.92Hiroshi Fukuoka & Shoji Yamanaka
Source status unknown — claims are unverified
Phonon density of states, anharmonicity, electron-phonon coupling, and possible multigap superconductivity in the clathrate superconductors Ba8Si46 and Ba24Si100: Factors behind large difference in Tc
similarity 0.91Rolf Lortz et al.
Source status unknown — claims are unverified
Superconductivity in the (Ba1−xSrx)8Si46 clathrates (x⩽0.75): Experimental and ab initio investigation
similarity 0.91P. Toulemonde et al.
Source status unknown — claims are unverified
Interplay of superconductivity and structural phase transition in the clathrate Ba6Ge25
similarity 0.90H. Q. Yuan et al.
Source status unknown — claims are unverified
Enhancing the Superconducting Transition Temperature of BaSi2 by Structural Tuning
similarity 0.90José A. Flores-Livas et al.
Source status unknown — claims are unverified