Regensburg 2022 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 30: Superconductivity: Poster Session

TT 30.10: Poster

Donnerstag, 8. September 2022, 15:00–18:00, P1

Piezoelectric control of the electrical field-effect in superconductors — •Leon Ruf, Sara Khorshidian, Sohaila Noby, Jennifer Koch, Elke Scheer, and Angelo Di Bernardo — Department of Physics, University of Konstanz, Konstanz, Germany

Superconducting (sc) transistors are promising building blocks for future superconductors by virtue of their low energy consumption. For real applications this requires devices with Complementary metal-oxide-semiconductor (CMOS) compatibility, high switching speed and high scalability. Some realizations of superconductor/semiconductor hybrid systems, such as Nanocryotrons (nTrons) [1] or thermal driven sc-nanowires (hTron) [2] have already been put forward. An alternative promising architecture are gate-controlled sc devices. Reversible switching via gate-controlled sc-transistors (EF-Trons) has been independently seen for various BCS superconductors, such as Ti [3] and V [4]. Still the physical effect of the EF-Trons is not fully understood and is under debate [5]. By coupling epitaxial piezo-/ferroelectrics to the EF-Trons, we investigate the role of strain and amplification of the electric field through these materials on the switching behavior. We present first results of the growth of epitaxial piezo-/ferroelectrics and characterization of EF-Trons coupled with piezo-/ferroelectrics.

[1] A. N. McCaughan et al., Nano Lett. 14, 5748 (2014)

[2] A. N. McCaughan et al., Nat. Electron. 2, 451 (2019)

[3] G. De Simoni et al., Nat. Nanotechnol. 13, 802 (2018)

[4] F. Paolucci et al., AVS Quantum Sci. 1, 016501 (2019)

[5] I. Golokolenov et al., Nat. Commun. 12, 2747 (2021)