Chaos (Physics)
- Chaos Presents: Dr Sven Friedemann - 'Pathways towards High-Temperature Superconductivity' Mott Lecture Theatre, G12 - Physics Building Tuesday 18-11-2025 - 17:00 until Tuesday 18-11-2025 - 18:00
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Chaos Presents: Dr Sven Friedemann - 'Pathways towards High-Temperature Superconductivity'
Talk is open to everyone, pizza afterwards limited to Chaos members only
Talk abstract:
Superconductors conduct electrical currents without losses and host a robust quantum state over micrometre length scales. These two features are exploited for current applications like power transmission, generation of very strong magnetic fields for medical imaging, and quantum computing. So far, industrial applications rely on superconductors at very low temperature – mostly at ~10K (-260°C).
Superconductivity is not restricted to low temperatures! Indeed, transition temperatures up to 260 K (-13 °C) have been reproducibly demonstrated in H3S, LaH10, YH9, and other hydride compounds at very high pressures [1–3]. This is a success story of both theory and experiment. Theory has, for the first time, mastered significant predictions of new superconductors and has been an indispensable guidance to experimental efforts. Experiments have mastered many technical challenges. Together, these efforts open pathways to realise higher transition temperature at low pressures in the future.
At Bristol, we study hydride superconductors. We have solved many technical challenges for experimental studies of hydrides above 1 million atmospheres pressure. We have characterised superconductivity in H3S and LaH10 and we have discovered the new superconductor La4H23[4]. These measurements have been made possible through developments of robust thin-film methods for high-pressure research.
[1] Kong, P. et al. Nature Communications 12, 5075 (2021).
[2] Somayazulu, M. et al. Phys. Rev. Lett. 122, 027001 (2019).
[3] Drozdov, A. P. et al. Nature 525, 73 (2015).
[4] Cross, S. et al. Phys. Rev. B 109, L020503 (2024).
Venue/Timing
Venue : Mott Lecture Theatre, G12 - Physics Building
Type: Free, Society Events, Talks and Lectures
Start Date: Tuesday 18-11-2025 - 17:00
End date: Tuesday 18-11-2025 - 18:00
Contact Details
Daniel Skoczek
yn22285@bristol.ac.uk
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