E. E. Pestov, P. A. Yunin, D. V. Masterov, A. E. Parafin, S. A. Pavlov, E. A. Arkhipova, D. A. Savinov, “Effect of the microstructure of ultrathin YBaCuO films on the nonlinear microwave response”, Fizika Tverdogo Tela, 2025, Volume 67, Issue 7,Pages <nobr>1236

XXIX International Symposium "Nanophysics and Nanoelectronics", Nizhny Novgorod, March 10-14, 2025
Superconductivity

Effect of the microstructure of ultrathin YBaCuO films on the nonlinear microwave response

E. E. Pestov^ab, P. A. Yunin^ab, D. V. Masterov^a, A. E. Parafin^a, S. A. Pavlov^a, E. A. Arkhipova^a, D. A. Savinov^ab

^a Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhnii Novgorod
^b Lobachevsky State University of Nizhny Novgorod

Abstract: Local measurements of the nonlinear microwave response were carried out using the near-field microwave technique for an ultrathin YBaCuO film with an inhomogeneous thickness distribution of 1–6 nm. Its microstructure has been studied using X-ray diffraction analysis. The experimental results indicate that the nonlinear response in the low temperature region may be related to the presence of Andreev bound states in the supercrystalline phase of the YBaCuO film.

Keywords: high-temperature superconductors, near-field microwave microscopy, microstructure, Andreev bound states, ultrathin films.

Received: 06.03.2025
Revised: 06.03.2025
Accepted: 05.05.2025

DOI: 10.61011/FTT.2025.07.61179.12HH-25