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Information × Registration Number 0221U107180, 0121U109286 , R & D reports Title Research and development of perspective nanostructured objects for quantum engineering popup.stage_title Head Shevchenko Serhii M., Доктор фізико-математичних наук Registration Date 28-12-2021 Organization B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine popup.description2 Objects of research – semiconductor quantum dots, superconducting qubits and quantum meta-materials; processes of spatial structure formation of penetrating microwaves; anisotropy of the tunneling magnetoresistance of CrO2 nanocomposite; the process of transferring metal ions through a semiconductor (SC) during its electrical breakdown. The aim of the work is to generalize the theoretical description of periodically excited quantum systems; hardware and software optimization of laser scanning microscopy (LSM) methods and their testing on meta-materials; detection of the correlation between spin-dependent electron tunneling and the degree of acquired magnetic anisotropy, which occurs during the compression of CrO2 nanoparticles; development of methods and devices for fabrication of Josephson nanocontacts and nanowires by electric breakdown of insulator or SC layer between two electrodes; study of superconducting and structural properties of ultrathin MoSi films for highly efficient single photon detectors. Research methods - modern methods of theoretical physics; phase-sensitive LSM microwave contrast; method of measuring the resistance of CrO2 nanocomposites at different orientations of the magnetic field relative to the axis of compression of the samples; measurement of the breakdown voltage of the SC and the resistance of the emerging metal nanocontacts; transmission electron microscopy, X-ray diffractometry. The theory of description of periodically excited quantum systems taking into account temperature, dissipative environment, excitation is systematically considered and conclusions concerning quantum interferometry are made. A new method of high-frequency LSM for spatial mapping of two-dimensional structure of phase and amplitude distributions of microwave currents in quantum magnetic meta-material has been developed and implemented. It is shown that the anisotropy of the tunneling magnetoresistance is related to the magnetic anisotropy. Product Description popup.authors popup.nrat_date 2022-03-09 Close