High-pressure effect on the superconductivity of YB6
S. Gabáni, I. Takáčová, G. Pristáš, E. Gažo, K. Flachbart, T. Mori, D. Braithwaite, M. Míšek, K. V. Kamenev, M. Hanfland, P. Samuely
DOI 10.1103/PhysRevB.90.045136 · 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
Pressure effects on superconducting properties of two YB6 samples (Tc=5.9 and 7.5 K) were investigated by measurements of electrical resistivity, magnetic susceptibility, and x-ray diffraction in the pressure range up to 320 kbar. Magnetoresistivity measurements down to 60 mK and up to 47 kbar have shown a negative pressure effect on Tc as well as on the third critical field Hc3 with the slopes dlnTc/dp=−0.59%/kbar and dlnHc3/dp=−1.1%/kbar, respectively. The magnetic susceptibility measurements evidenced that the slope of dlnTc/dp gradually decreases with pressure reaching a value three times smaller at 112 kbar. The lattice parameter measurements revealed the volume reduction of 14% at 320 kbar. The pressure-volume dependence is described by the Rose-Vinet equation of state. The obtained relative volume dependence dlnTc/dlnV analyzed by the McMillan formula for Tc indicates that the reduction of the superconducting transition temperature is mainly due to hardening of the Einstein-like phonon mode responsible for the superconducting coupling. This is confirmed by the analysis of the resistivity measurements in the normal state up to T=300 K performed at pressures up to 28 kbar.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YB6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.5 | Pressure unresolved | midpoint |
| YB6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.9 | Pressure unresolved | midpoint |
| YB6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.5 | Pressure unresolved | midpoint |
| YB6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.9 | Pressure unresolved | midpoint |
| YB6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.5 | 4.7 GPa | midpoint |
| YB6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.9 | 11.2 GPa | midpoint |
| YB5.7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.6 | Pressure not reported | unknown |
| YB5.9 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.6 | Pressure not reported | unknown |
Similar papers
High pressure effect on superconductivity of YB6
similarity 1.00S. Gabáni et al. · 2014 · arXiv:1407.4583
Source status unknown — claims are unverified
Pressure dependence of the superconducting transition temperature in C6Yb and C6Ca
similarity 0.96Robert P. Smith et al.
Source status unknown — claims are unverified
Superconductivity mediated by a soft phonon mode: Specific heat, resistivity, thermal expansion, and magnetization of YB6
similarity 0.95R. Lortz et al.
Source status unknown — claims are unverified
Stability and superconductivity of Ca-B phases at ambient and high pressure
similarity 0.95Sheena Shah & Aleksey N. Kolmogorov
Source status unknown — claims are unverified
Lattice instability and enhancement of superconductivity in YB6
similarity 0.95N. Sluchanko et al.
Source status unknown — claims are unverified
Linear and nonlinear low-frequency electrodynamics of surface superconducting states in an yttrium hexaboride single crystal
similarity 0.94M. I. Tsindlekht et al.
Source status unknown — claims are unverified