en
Scientific article
Open access
English

Emergence of superconductivity in BaNi2(Ge1−xPx)2 at a structural instability

Publication date2012-09-19
First online date2012-09-19
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.

eng
Affiliation Not a UNIGE publication
Research group
Citation (ISO format)
HIRAI, Daigorou, VON ROHR, Fabian, CAVA, R. J. Emergence of superconductivity in BaNi<sub>2</sub>(Ge<sub>1−x</sub>P<sub>x</sub>)<sub>2</sub> at a structural instability. In: Physical review. B, Condensed matter and materials physics, 2012, vol. 86, n° 10, p. 100505. doi: 10.1103/PhysRevB.86.100505
Main files (1)
Article (Published version)
accessLevelPublic
Identifiers
ISSN of the journal1098-0121
81views
36downloads

Technical informations

Creation07/14/2022 1:38:00 PM
First validation07/14/2022 1:38:00 PM
Update time03/16/2023 7:00:16 AM
Status update03/16/2023 7:00:15 AM
Last indexation02/01/2024 8:29:19 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack