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Origin of superconductivity in hole doped SrBiO₃ bismuth oxide perovskite from parameter-free first-principles simulations

Physics

Origin of superconductivity in hole doped SrBiO₃ bismuth oxide perovskite from parameter-free first-principles simulations

J. Varignon

This fascinating study by Julien Varignon explores the mechanisms behind superconductivity in Sr1-xKxBiO3, showcasing how parameter-free DFT simulations reveal critical insights into the material's insulator-to-metal transition and its exceptional electron-phonon coupling. Discover the conditions essential for superconductivity in these intriguing bismuthates.

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Playback language: English
Abstract
This study uses parameter-free DFT simulations to investigate the origin of superconductivity in Sr1-xKxBiO3. The simulations successfully reproduce experimental observations, including the insulator-to-metal transition with increasing K doping and an electron-phonon coupling constant (λ) of 1.22, closely matching the experimental value of 1.3 ± 0.2. The proximity of a disproportionated phase is identified as a prerequisite for superconductivity in these bismuthates.
Publisher
npj Computational Materials
Published On
Mar 01, 2023
Authors
Julien Varignon
Tags
superconductivity
DFT simulations
Sr1-xKxBiO3
electron-phonon coupling
insulator-to-metal transition
bismuthates
doping

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