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RESEARCH PRODUCT
Effect of pressure on superconductivity in NaAlSi
Sergey A. MedvedevLukas MüchlerVadim KsenofontovRobert J. CavaJennifer SchmittFrederick CasperMartin JansenJürgen NussLeslie M. SchoopClaudia Felsersubject
SuperconductivityMaterials scienceCondensed matter physicsElectrical resistivity and conductivityFermi surfaceElectronic structureIsostructuralCondensed Matter PhysicsElectronic band structureTernary operationPnictogenElectronic Optical and Magnetic Materialsdescription
The ternary superconductor NaAlSi, isostructural with LiFeAs, the ``111'' iron pnictide superconductor, is investigated under pressure. The structure remains stable up to 15 GPa. Resistivity and susceptibility measurements show an increase of ${T}_{c}$ up to 2 GPa, followed by a decrease until superconductivity disappears at 4.8 GPa. Band structure calculations show that pressure should have a negligible effect on the electronic structure and the Fermi surface and thus the disappearance of superconductivity under pressure must have a different origin. We compare the electronic structure of NaAlSi under pressure with that of nonsuperconducting isostructural NaAlGe.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-11-30 | Physical Review B |