Séminaire / Seminar - Artificial high Tc superlattices made by quantum design of quantum wells showing superconductivity controlled by nanoscale geometry via Fano-Feshbach resonance - Antonio Bianconi

26 avril 2024, 14h00

Amphithéâtre Charpak, Campus Pierre et Marie Curie - Sorbonne Université, 4, place Jussieu, 75005 Paris

Antonio Bianconi - RICMASS Rome International Center for Materials Science, Rome, Italy and Institute of Crystallography, CNR, Monterotondo, Rome, Italy

Abstract 

At 38 years from the discovery of high Tc superconductivity in natural copper oxide perovskites, we report first-principles quantum material design of the optimal topology of artificial 2-5 nm heterostructures making possible to shed light on the mechanism of high temperature superconductivity (HTS). We present practical application of the theory of the superconducting multiple gaps superconductivity in quantum nanostructured materials where quantum geometry controls quantum functionality. Advances in few-nm technology makes now feasible to verify theory predictions by synthesis of artificial superlattices of quantum wells controlling the spin-orbit coupling (SOC) due to the internal electric field in interface superconductivity and tuning the system at unconventional Lifshitz transitions in nanoscale superlattices [1-5].

1. Mazziotti, M. V., Valletta, A., Raimondi, R., & Bianconi, A. (2021). Multigap superconductivity at an unconventional Lifshitz transition in a three-dimensional Rashba heterostructure at the atomic limit. Physical Review B, 103(2), 024523.
2. Campi, G., & Bianconi, A. (2021). Functional nanoscale phase separation and intertwined order in quantum complex materials. Condensed Matter, 6(4), 40.
3. Mazziotti, M. V., Raimondi, R., Valletta, A., Campi, G., & Bianconi, A. (2021). Resonant multi-gap superconductivity at room temperature near a Lifshitz topological transition in sulfur hydrides. Journal of Applied Physics, 130(17), 173904.
4. Mazziotti, M. V., Bianconi, A., Raimondi, R., Campi, G., & Valletta, A. (2022). Spin–orbit coupling controlling the superconducting dome of artificial superlattices of quantum wells. Journal of Applied Physics, 132(19), 193908
5. Logvenov, G., Bonmassar, N., Christiani, G., Campi, G., Valletta, A., & Bianconi, A. (2023). The Superconducting Dome in Artificial High-Tc Superlattices Tuned at the Fano–Feshbach Resonance by Quantum Design. Condensed Matter, 8(3), 78.