Emergence of superconductivity in BaNi2(Ge1−xPx)2 at a structural instability
Daigorou Hirai, F. von Rohr, R. J. Cava
DOI 10.1103/PhysRevB.86.100505 · 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
The physical properties and structural evolution of the 122-type solid solution BaNi2(Ge1−xPx)2 are reported. The in-plane X-X (X = Ge1−xPx) dimer formation present in the end member BaNi2Ge2, which results in a structural transition to orthorhombic symmetry, is completely suppressed to zero temperature on P substitution near x=0.7, and a dome-shaped superconducting phase with a maximum Tc=2.9 K emerges. Clear indications of phonon softening and enhanced electron-phonon coupling are observed at the composition of the structural instability. Our findings show that dimer breaking offers possibilities as a tuning parameter of superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BaNi2(Ge1-xPx)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.9 | Pressure not reported | unknown |
| BaNi2(Ge1-xPx)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.9 | Pressure not reported | unknown |
| BaNi2P2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.5 | Pressure not reported | unknown |
| BaNi2P2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.5 | Pressure not reported | unknown |
| BaNi2(As1-xPx)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.3 | Pressure not reported | unknown |
Similar papers
The emergence of superconductivity in BaNi2(Ge1-xPx)2 at a structural instability
similarity 1.00Hirai, Daigorou et al. · 2012 · arXiv:1208.0311
Source status unknown — claims are unverified
Superconductivity and the effects of pressure and structure in single-crystalline SrNi2P2
similarity 0.96F. Ronning et al.
Source status unknown — claims are unverified
Anomalous pressure dependence of the superconducting transition temperature in TlNi2Se2−xSx
similarity 0.95S. K. Goh et al.
Source status unknown — claims are unverified
Tuning the structure and superconductivity of SrNi2P2 by Rh substitution
similarity 0.95J. Schmidt et al.
Source status unknown — claims are unverified
Three-dimensional nature of normal and superconducting states in BaNi2P2 single crystals with the ThCr2Si2-type structure
similarity 0.95Y. Tomioka et al.
Source status unknown — claims are unverified
Electronic and structural properties of low-temperature superconductors and ternary pnictides ANi2Pn2 (A=Sr,Ba and Pn=P,As)
similarity 0.94I. R. Shein & A. L. Ivanovskii
Source status unknown — claims are unverified