Superconductors out of equilibrium: A frontier in conventional superconductivity research

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• Mads Fonager Hansen
• Wednesday 06 November 2024, 11:15-12:00
• Mott Seminar Room (531), Cavendish Laboratory, Department of Physics.

If you have a question about this talk, please contact Mads Fonager Hansen.

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Superconductors have rich potential in technological applications and so discovering new materials that can push the boundaries of their properties is of great interest to a broad community. Searching for new materials with desired properties is possible within the space of conventional superconductivity since these are well understood by theory. The notion that high temperature superconductivity can be achieved in materials with very light elements, such as the lightest of them all, hydrogen, has long since been established [1,2]. Following this idea, a prolific and strong research community has sprung up, resulting in the superhydrides, materials with incredible transition temperatures in the realm of room temperature. While this represents an awesome feat of science and technology, these materials unfortunately also live in the realm of the Earth’s core-mantel boundary, i.e. at extreme pressures. So, how do we push the frontier of superconductor technology further? In this talk I will discuss the challenges faced in conventional superconductivity research and how we may address these by using pressure to access meta stable states in phase space [3-5].

References:

[1] N. W. Ashcroft. Metallic hydrogen: A high-temperature superconductor? Phys. Rev. Lett., 21:1748–1749, Dec 1968. doi:10.1103/PhysRevLett.21.1748.

[2] N. W. Ashcroft. Hydrogen dominant metallic alloys: High temperature superconductors? Phys. Rev. Lett., 92: 187002, May 2004. doi:10.1103/PhysRevLett.92.187002.

[3] M.F. Hansen et al. Synthesis of Mg2IrH5: A potential pathway to high-Tc hydride superconductivity at ambient pressure (https://doi.org/10.48550/arXiv.2406.09538)

[4] K. Dolui, et al., Feasible route to high-temperature ambient-pressure hydride superconductivity. Phys. Rev. Lett., 132:166001, Apr 2024. doi:10.1103/PhysRevLett.132.166001

[5] L. Zhu, et al., Superconductivity in SrB3C3 clathrate, Phys. Rev. Research 5, 013012 https://doi.org/10.1103/PhysRevResearch.5.013012

This talk is part of the Quantum Matter Seminar series.

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