Pressure-Induced Superconductivity in β−Na0.33V2O5 beyond Charge Ordering

T. Yamauchi; Y. Ueda; N. Môri

doi:10.1103/PhysRevLett.89.057002

← Back to search

Pressure-Induced Superconductivity in β−Na0.33V2O5 beyond Charge Ordering

T. Yamauchi, Y. Ueda, N. Môri

DOI 10.1103/PhysRevLett.89.057002 · Physical Review Letters

T1

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

We report the discovery of a new superconducting phase in highly correlated 3d electron systems. The compound is β-vanadium bronze, β−Na0.33V2O5, in which the charge-ordered phase collapses under hydrostatic high pressure and a pressure-induced superconducting phase appears around TSC=8 K, P=8 GPa. This report presents the first observation not only of superconductivity in vanadium oxides but also of a phase transition from charge ordered to superconducting on a pressure-temperature (P−T) plane. The phase diagrams seem to have universal aspects across the classes of materials. This indicates a profound physics of superconductivity in highly correlated electron systems.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Na0.33V2O5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	8	8 GPa	onset
Na0.33V2O5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	6	8 GPa	onset
Na0.33V2O5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	9	7 GPa	onset
Na0.33V2O5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	4	8.5 GPa	onset