Can topological transitions be exploited to engineer intrinsically quench-resistant wires?
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In this paper, we investigate whether by synthesizing superconductors that are tuned to a topological, node-reconstruction transition point, we could create superconducting wires that are intrinsically resilient to quenches. Recent work shows that the exponent characterizing the temperature dependence of the specific heat of a nodal superconductor is lowered over a region of the phase diagram near topological transitions where nodal lines form or reconnect. Our idea is that the resulting enhancement of the low-temperature specific heat could have a potential application in the prevention of superconductor quenches. We perform numerical simulations of a simplified superconductor quench model. Results show that decreasing the specific heat exponent can prevent a quench from occurring and improve quench resilience, though in our simple model the effects are small. Further work will be necessary to establish the practical feasibility of this approach.
Whittlesea , P , Quintanilla , J , Annett , J F , Hillier , A D & Hooley , C 2018 , ' Can topological transitions be exploited to engineer intrinsically quench-resistant wires? ' IEEE Transactions on Applied Superconductivity , vol 28 , no. 4 , 8252800 . DOI: 10.1109/TASC.2018.2791515
IEEE Transactions on Applied Superconductivity
© 2018 IEEE. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1109/TASC.2018.2791515
This work was supported by EPSRC through the project “Unconventional superconductors: New paradigms for new materials” under Grant EP/P00749X/1 and Grant EP/P007392/1. The work of P. Whittlesea was supported by a University of Kent 50th Anniversary Scholarship. The work of J. Quintanilla was supported by a SEPnet Fellowship held during the early stages of this work.
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