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Journal Article

Effect of pressure on superconductivity in NaAlSi

MPS-Authors
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Nuss,  J.
Abteilung Jansen, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Department Quantum Materials (Hidenori Takagi), Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons280091

Jansen,  M.
Abteilung Jansen, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Schoop, L., Müchler, L., Schmitt, J., Ksenofontov, V., Medvedev, S., Nuss, J., et al. (2012). Effect of pressure on superconductivity in NaAlSi. Physical Review B, 86(17): 174522.


Cite as: https://hdl.handle.net/21.11116/0000-000E-C1E3-7
Abstract
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.