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23PH-I-5
4D-laser technology in nanocluster physics: macroscopic quantum states in thin films on solid surface (modelling and experiment)
S. Arakelian1,1. Chestnov1, A. Istratov1, T. Khudaiberganov1, A. Kucherik1, S. Kutrovskaya1, A. Osipov1, D. Buharov1, O. Butkovskiy1
1Vladimir State University, Department of Physics and Applied Mathematics, Vladimir, Russian Federation
1. Laser-induced nanostructures and thin films with controllable topology are depended on the laser pulses duration, and may be associated with the 4D-laser technology fabrication of new structures and materials. In fact, the interaction effects of solid targets with laser pulses of different durations for obtaining of various nanocluster structures can be viewed as the possibility of synthesizing the 4D-objects. The result depends not only on the stationary topological/geometric parameters of the system, but also on the dynamic interactions in the system leading to different final stable structures. This is due to the condition that specific mechanisms of nanostructuring are activated. Therefore, time plays the role of a control parameter responsible for phase transitions, as well as the spatial parameters do when nanostructures of various dimensions arise -from quantum dots (0D) to 3D nanostructures. We completed several laser procedures for obtaining nanostructures and thin films with controllable topology. They occur under development of different nonlinear processes in the system (thermodiffusion, gas-dynamic evaporation in porelike structures with bubbles, ablation products, ballistic movement of the particles in liquid).
2. The physical properties of nanocluster systems are very sensitive to the form, size and distance/spatial distribution between their components. The fact is well known for any material in general, but to change these parameters and to carry out the stable conditions for the ordinary solid state objects we need to put the objects under extremal conditions (cf.[1]). In contrast, nanocluster structures can be easily modified in necessary way in the femto- nanophotonics laser experiments [2]. In our modeling the original shape of the nanoobject was considered spherical but being transformed by the key parameters: values and numbers of the azimuthal distortion coefficient (in terms of «latitude») and the zenithal distortion coefficient (in terms of «longitude»). The electronic energetic bands of the materials may vary dramatically in the case. The topology peculiarities of the granulated metallic film deposited on dielectric substrates are discussed in clustered metallic structures in path integral approach [3] for both Volt-Ampere characteristics and the optical transmission spectra (cf. [4-6]).
3. In superconductor problem the question is how to fabricate the coupling states for charged particles being responsible for electroconductivity. For a cluster system we discuss some alternative mechanisms of electronic coupling (in equilibrium states), and not via a standard Cooper phonon coupling [1]. In our experiment, we obtained a dramatic enhancement (in several orders) of electro-conductivity due to the variation of topological peculiarities of a nanocluster thin film system (cf. [7]). The process may be interpreted as a non-equilibrium phase transition in topological structure induced by laser radiation [8]. Random temporal and spatial variations in selection topological parameters may result in large variations of such coupling (cf. [9]).
References
[1] Lifshitz E.M., Pitaevsky L.P. (2015) Theoretical Physics. Statistical Physics.Part.2: Theory of
Condensate State. Vol. IX. M. : Fizmatlit 440.
[2] Arakelian S.M., Kucherik A.O., Prokoshev V.G., et al.(2015) Introduction to the femtosecond nanophotonics, Fundamental principles and methods of laser diagnostics and control of nanostructured materials. M.: Logos. 744.
[3] Feynmann R.P., Hibbs A.R. (1965) Quantum Mechanics and Path Integrals. McGraw - Hill Book Company, N.Y. 384.
[4] Kavokin A. V., Kutrovskaya S. V., et. al. (2017) The crossover between tunnel and hopping conductivity in granulated films of noble metals. Superlattices and Microstructures 111:335-339.
[5] Kutrovskaya S. V., Arakelian S. M., et. al. (2017) The Synthesis of Hybrid Gold- Silicon Nano Particles in a Liquid. Scientific Reports 7:10284.6.
[6] Kucherik A., Kutrovskaya S., Osipov A., et al. (2019) Nano-antennas based on silicon-gold nanostructures. Scientific Reports. V.9. 338 (1-6).
[7] Arakelian S.M., Kucherik A.O., Kutrovskaya S.V., et al. (2018) Laser-induced nanocluster thin-film systems with controlled topology and composition: the possibility of creating superconducting structures based on new physical principles. Crystallography Reports. 63. 7. P.1173-1177
[8] Arakelian S., Kucherik A., Kutrovskaya S., Kavokin A. New challenges of femto-nanophotonics: basic principles and possible applications. (2019) Journal of Physics: Conference Series. V.1164. 012016 (1-7).
[9] Horsthemke W., Malek Mansour M. (1976) The Influence of External Noise on Non-Equilibrium Phase Transitions. Zs. Phys. B 24. 307-313.
