Prof. Aleksandr Sipatov | Experimental methods | Best Researcher Award

Professor at National Technical Univercity “Kharkiv Polytechnic Institute” | Ukraine

Dr. Alexander Yurievich Sipatov is a distinguished Professor in the Metal and Semiconductor Physics Department at the National Technical University “Kharkov Polytechnic Institute” (KPI), Ukraine. Born on March 21, 1957, in Nizhny Novgorod, Russia, Dr. Sipatov has had a long and illustrious career spanning over several decades in the field of semiconductor physics and nanostructures. His work has made notable contributions to the development of quantum effects and the exploration of superconductivity and thermoelectric properties in semiconductor multilayer nanostructures.

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Early Academic Pursuits 🎓

Dr. Sipatov’s academic journey began at the National Technical University “Kharkov Polytechnic Institute” (KPI), where he earned his Engineer-Physicist degree in 1980. He pursued postgraduate studies at KPI, completing his Ph.D. in 1986 and later achieving the title of Doctor of Science in 2007. Between 1995 and 1998, Dr. Sipatov was awarded a Postdoctoral stipend to further hone his expertise and research skills. His academic achievements laid the foundation for a highly successful career in semiconductor physics.

Professional Endeavors 💼

Dr. Sipatov’s professional career at KPI began in 1980 as an Engineer, and his role rapidly evolved over the years. He served as a Junior Researcher from 1983 to 1990, a Researcher from 1990 to 1992, and as a Senior Researcher from 1992 to 1995 and 1998 to 2007. His increasing responsibilities and leadership roles included becoming a Leading Researcher from 2007 to 2012 and the Head of the Technical Cryophysics Department at KPI from 2012 to 2020. Since 2020, he has held the position of Professor at KPI, where he continues to contribute significantly to both teaching and research.

Contributions and Research Focus 🔬

Dr. Sipatov’s research focuses on the growth, structure, and electronic, optic, magnetic, and thermoelectric properties of semiconductor multilayer nanostructures, particularly chalcogenides of elements such as lead (Pb), tin (Sn), bismuth (Bi), europium (Eu), and ytterbium (Yb). His studies have led to several groundbreaking discoveries, including:

1. Energy Spectrum Quantization in thin films, notably in PbS films and PbS-EuS superlattices, identified by shifts in the photoluminescence edge.
2. Resonant Tunneling phenomena observed through negative differential resistance in PbS-EuS double barrier tunneling structures.
3. The discovery of superconductivity in IV-VI superlattices, with Tc values between 3-6 K.

Currently, Dr. Sipatov is investigating the thermoelectric and magnetic properties of semiconductor thin films and nanostructures, which have important applications in energy efficiency and advanced electronics.

Impact and Influence 🌍

Dr. Sipatov’s work has had a profound impact on quantum physics and the field of nanostructures. His findings have broadened the understanding of quantum effects in semiconductors, contributing to advances in quantum technologies and low-temperature physics. Furthermore, his contributions to superconductivity have opened up new avenues for research in quantum computing and energy-efficient technologies. The interdisciplinary nature of his work positions him as a key figure in nanoscience, with direct implications for industries ranging from electronics to energy storage.

Academic Cites 📚

Dr. Sipatov is a highly published researcher with more than 60 publications in peer-reviewed journals, showcasing his dedication to advancing scientific knowledge. His work is indexed in Scopus (ID: 7004596183), highlighting his significant influence and recognition in the scientific community. His research continues to be cited by scholars worldwide, cementing his reputation as a thought leader in semiconductor physics and nanotechnology.

Research Skills 🔧

Dr. Sipatov possesses a broad range of specialized research skills, including:

• Material Synthesis and Growth of semiconductor multilayer nanostructures.
• Expertise in quantum effects such as energy spectrum quantization and resonant tunneling.
• Advanced techniques for studying superconductivity and the magnetic properties of semiconductor materials.
• Deep understanding of thermoelectric phenomena and their practical applications.

His expertise in low-temperature physics and nanoelectronics places him at the cutting edge of research in these fields.

Teaching Experience 📖

As a Professor at KPI, Dr. Sipatov has dedicated a significant portion of his career to teaching and mentoring the next generation of scientists and engineers. His leadership as the Head of the Technical Cryophysics Department between 2012 and 2020 provided an invaluable platform for the development of young researchers in the field of semiconductor physics. Through his courses and research supervision, Dr. Sipatov has influenced countless students, shaping the future of material science and nanotechnology.

Legacy and Future Contributions 🔮

Dr. Sipatov’s research legacy lies in his innovative contributions to the understanding of quantum effects in semiconductor nanostructures and superconductivity. His work on thermoelectric and magnetic properties holds the potential to revolutionize energy-efficient technologies and next-generation electronics. Moving forward, his future contributions are likely to focus on advanced materials for quantum computing and renewable energy solutions, continuing to drive progress in sustainable technologies and nanoscience.

Publications Top Notes

Interdiffusion in chalcogenide semiconductor superlattice nanostructures

• Authors: A.Y. Sipatov, L.E. Konotopsky, E. Moroz, V.V. Volobuev
  Journal: Solid State Communications
  Year: 2025

Quantum interference phenomena and electron – electron interaction in topological insulator Bi2Se3 thin polycrystalline films

• Authors: O.I. Rogachova, O. Pavlosiuk, A.V. Meriuts, K.V. Novak, D. Kaczorowski
  Journal: Thin Solid Films
  Year: 2022

Growth mechanism, structure and thermoelectric properties of thermally evaporated Bi2(Te0.9 Se01)3 thin films

• Authors: O.I. Rogachova, S. Kryvonohov, A.G. Fedorov, O.N. Nashchekina, K.V. Novak
  Journal: Functional Materials
  Year: 2022

Effect of aging on thermoelectric properties of the Bi2Te3 polycrystals and thin films

• Authors: O.I. Rogachova, K.V. Novak, A.N. Doroshenko, T.I. Khramova, S.A. Saenko
  Journal: Functional Materials
  Year: 2021

Size effects and thermoelectric properties of Bi0.98Sb0.02 thin films

• Authors: O.I. Rogachova, K.V. Novak, D.S. Orlova, O.N. Nashchekina, G.V. Lisachuk
  Journal: Journal of Thermoelectricity
  Year: 2020