Alexei KUZMIN

Dr. phys. Alexei KUZMIN Researcher Institute of Solid State Physics, University of Latvia Kengaraga iela 8 Riga, LV 1063 Latvia Phone: +371 67251691 Fax: +371 67132778 E-mail: a.kuzmin@cfi.lu.lv; xas@latnet.lv

Born: August 12, 1968, Riga, Latvia

Languages: Russian, Latvian, English, Italian

Interests:

• X-Ray Absorption Spectroscopy (EXAFS, XANES)
• Physics of Disordered Materials (Thin Films, Solid Solutions, Glasses, Aqueous Solutions)
• Electrochromic Materials based on Transition Metal Oxides (WO_3-x, MoO₃, ReO₃, IrO₂, NiO_x, V₂O₅, etc.)

Brief Description of Main Research: My recent scientific activities are concerned mainly with x-ray absorption spectroscopy of materials containing transition-metal ions (crystals, solutions, crystalline and amorphous thin films, glasses and gels). The main research topics are related to phase transitions, local structural distortions, vibrational dynamics and localisation processes. Besides I study the sensitivity of the x-ray absorption fine structure (XAFS) to high-order atom-atom correlation functions, and in this connection I am directly involved in the theoretical analysis of experimental data with the use of ab initio multiple-scattering approach. I am the author of the original EXAFS data analysis software package EDA, the original approximated method for performing the MS calculations of  XAFS and experimental data collection interface for laboratory EXAFS-spectrometer at the institute. At present moment, the EDA package is used in about 20 laboratories all around the world from Japan to USA and is included in the European Synchrotron Radiation Facility (ESRF) software distribution list.

Education

• University of Latvia (Faculty of Physics), cum laude, 1990
• Dr.phys. (Ph.D.), Thesis: Study of 4d and 5d Transition Metals Oxide Compounds by X-Ray Absorption Spectroscopy IXAS, Institute of Solid State Physics, University of Latvia, 1992
• Higher European Research Course for Users of Large Experimental Systems "HERCULES-1993" in the field of Neutrons and Synchrotron Radiation for Condensed Matter Studies (Option: Physics and Chemistry of Solids), ESRF, Grenoble, France, 1993

Experience

Institute of Solid State Physics, University of Latvia:

• Engineer, 1986-1989
• Junior Researcher (1990 - 1993), Researcher (1993 -   ), Department of Semiconductor Materials

Research abroad ( Visiting scientist):

• Fachbereich Physik, Universität Rostock (Germany), 1992
• Laboratori Nazionale di Frascati, Instituto Nazionale de Fisica Nucleare (Italy), 1992
• Departimento di Fisica, Universita di Trento ( Italy), 1991-1993
• Centro CNR-ITC di Fisica degli Stati Aggregati ed Impianto Ionico (Trento, Italy) -   1993 (April-May), 1994 (March-August), 1995 (October-December), 1996 (October-December), 1997 (July-September)

Honours and Awards

• Corresponding Member, Latvian Academy of Sciences, 2005
• Academia Europaea Baltic Prize for the work "X-Ray Absorption Spectroscopy Study of Transition Metals Oxide Compounds and Related Materials", 1996.

Professional Activities and Memberships

• Member, New York Academy of Sciences, 1995-1997
• Member, Latvian Synchrotron Radiation Society, 1997
• Member, European Synchrotron Radiation Society, 1992
• Member, International XAFS (X-ray Absorption Fine Structure) Society, 1994
• Member, American National Geographic Society, 1996

Recent/Representative Publications

I am author and co-author of more than 90 papers and conference abstracts.

• A.Kuzmin, J. Purans, M. Benfatto and C. R. Natoli. X-ray absorption study of rhenium L₃ and L₁ edges in ReO₃: Multiple-scattering approach. - Phys. Rev. B, 1993, vol.47, pp.2480-2486.
• Kuzmin and Ph. Parent. Focusing and superfocusing effects in x-ray absorption fine structure at the iron K edge in FeF₃. -  J. Phys.: Condensed Matter, 1994, vol.6, pp.4395-4404.
• A.Kuzmin. Anisotropy of the photoelectron mean free path and its influence on EXAFS amplitude. - J. Phys.: Condensed Matter,1994, vol.6, pp.5761-5770
• A.Kuzmin and R. Grisenti. Evaluation of multiple-scattering contribution in EXAFS for MeO₄ and MeO₆ clusters. -  Phil. Mag. B, 1994, vol.70, pp.1161-1176.
• A.Kuzmin, N. Mironova, J. Purans and A. Rodionov. X-ray absorption spectroscopy study of Ni_c Mg_1-cO solid solutions on Ni K edge. - J. Phys.: Condensed Matter, 1995, vol.7, pp.9357-9368.
• Rocca, A. Kuzmin, J. Purans and G. Mariotto. X-ray absorption spectroscopy of a Nd³⁺ -exchanged beta-alumina crystal. -  Phys. Rev.B, 1996, vol.53, pp.11447-11450.
• A.Kuzmin, J. Purans, G. Dalba, P. Fornasini and F. Rocca. High-temperature x-ray absorption spectroscopy study of ReO₃. -  J. Phys.: Condensed Matter, 1996, vol.8, pp.9083-9102.
• A.Kuzmin and J. Purans. X-ray absorption study of the local environment around tungsten and molybdenum ions in tungsten-phosphate and molybdenum-phosphate glasse. - Proc. SPIE, 1997, vol.2968, pp.180-185.
• A.Kuzmin, N. Mironova and J. Purans. Influence of pd-mixing and magnetic interactions on the pre-edge peak intensity at the Co (Ni) K absorption edge in Co(Ni)_cMg_1-cO solid solutions. - J. Phys.: Condensed Matter, 1997, vol.9, pp.5277-5286.
• A.Kuzmin. Reconstruction of the radial distribution function from EXAFS: new trends and comparative analysis of different methods. - J. Physique IV (France), 1997, vol.7, pp.C2-213-C2-214.
• A.Kuzmin, S. Obst and J. Purans. X-ray absorption spectroscopy and molecular dynamics studies of Zn²⁺ hydration in aqueous solutions. - J. Phys.: Condensed Matter, 1997, vol.9, pp.10069-10078.
• J.Purans, A.Kuzmin, Ph.Parent, C.Laffon. Study of the electronic structure of rhenium and tungsten oxides on the O K-edge. - Ionic, 1998, 4, pp.101-105
• A.Kuzmin, J.Purans, E.Cazzanelli, C.Vinegoni, G.Mariotto. XRD, EXAFS and Raman spectroscopy studies of pure ground WO₃ and mixed W_1-x Re_x O_3-y polycrystals. – J.Applied Physics, 1998, vol.84, pp.5515-5524
• E.Gazzanelli, C.Vinegoni, G.Mariotto, A.Kuzmin, J.Purans. Low temperature polymorphism in tungsten trioxide powders and its dependence on mechanical treatments. - J. Solid State Chem., 1999, vol.123, pp.67-74
• A.Kuzmin, J.Purans. Dehydration of molybdenum trioxide-hydrates MoO₃ .nH₂O: in-situ x-ray-absorption spectroscopy at the Mo K-edge. – J.Phys.: Condensed Matter, 2000, 12, pp.1959-1970.
• A.Kuzmin, J.Purans. Extended x-ray absorption fine structure spectroscopy of perovskite-type compounds. - In: Defects and Surface - Induced Effects in Advanced Perovskites (eds. G.Borstel, A.Krumins, D.Millers), NATO ASHT, ser.3, vol.77, 2000, Kluwer-Dordrecht, pp.139-144
• J.Purans, A.Azens, C.G.Granqvist. X-ray absorption study of Ce-Ti oxide films. - Electrochim. Acta, 2001, vol.46, pp.2055-2058
• A.Kuzmin, J.Purans, R.Kalendarev, D.Pailharey, Y.Mathey. XAS, XRD, AFM and Raman studies of NiO-WO₃ electrochromic thin films. - Electrochim. Acta, 2001, vol.46, pp.2233-2236
• V.L.Aksenov, A.Y.Kuzmin, J.Purans, S.I.Tiutiunnikov. EXAFS spectroscopy at synchrotron-radiation beams [Review] - Phys. Part. Nucl., 2001, vol.32, pp. 675 - 707.
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• N.Mironova-Ulmane, V.Skvortsova, A.Kuzmin, I.Sildos. Exciton-magnon interactions in single-crystal Ni_cMg_1-cO solid solutions. – Fiz. Tver. Tela, 2002, vol. 44, pp.1403-1406 [In Russian]; Phys. Solid State , 2002, vol.44, pp.1463-1467.
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• A.Kuzmin, N. Mironova-Ulmane, S. Ronchin. Origin of visible photoluminescence in NiO and Ni_cMg_1-cO single-crystals. – Proc. SPIE, 2003 vol.5122, pp. 62-68.
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• A.Kuzmin. Cluster approach to high performance computing. - Computer Modelling & New Technol., 2003, vol. 7, pp. 7-15.
• A.Kuzmin, J.Purans, G.Moreau. Full multiple scattering analysis of x-ray absorption near edge structure at the Eu L3-edge in EuO. - J.Alloys Compd., 2004, vol. 374, pp. 89-92.
• J.Gaidelene, A.Kuzmin, J.Purans. Oxygen K-edge x-ray absorption near-edge structure and crystalline and amorphous moplybdenum trioxides. - J.Phys: Condens. Matter, 2004, vol. 16, pp. 6619-6625.
• A.Kuzmin, J.Purans, R.Kalendarev. Ab initio calculations of the Ni K-edge XANES in Ni_cMg_1-cO solid solutions. - Phys. Stat. Sol. (C), 2005, vol. 2, pp. 665-668. 
• N.Mironova-Ulmane, V.Skvortsova, A.Kuzmin, I.Sildos. Influence of radiation effects on excition-magnon in nickel oxide. -   Proc. SPIE, 2005,  vol. 5946, pp. 93-97.
• V. Skvortsova, N. Mironova-Ulmane, A. Kuzmin, U. Ulmanis. Growth and optical properties of transition metal oxides single crystal solid solutions. - Alloys Compd., 442 (2007), pp.328-330.
• D. Chen, J. Zhong, W. Chu, Z. Wu, A. Kuzmin, N. Mironova-Ulmane, A. Marcelli. Structural disorder and electronic hybridization in Ni_cMg_1-cO solid solutions probed by XANES at the oxygen K-edge. – J. Phys.: Condens. Matter , 19 (2007), 356219 (11p).

 

Research Projects

• (Research Group Member). X-ray absorption spectroscopy of the disordered metal oxide compounds and amorphous solids. Latvian Council of Science (1994-1996).
• (Research Group Member). X-ray absorption spectroscopy study of intercalated compounds. International Science Foundation Research Grant (1994-1996).
• (Research Group Member). X-ray absorption spectroscopy of mixed transition metal oxides and chalcogenide compounds. Latvian Council of Science (1997-2000).
• (Head of Project). Nanocrystal Structure Reconstruction from X-Ray Absorption Spectra Using ab initio Theoretical Methods. Latvian Council of Science (2001-2004 ).
• (Head of Project). Advanced Spectroscopic Approach to the Study of Nanomaterials Structure.   Latvian Council of Science (2005 - ).
• Grant of Accademia Nazionale dei Lincei at Trento University (Trento, Italy), 1993
• NATO Guest Fellowship at Centro CNR-ITC di Fisica degli Stati Aggregati ed Impianto Ionico (Trento, Italy), 1995.

Last update: 11-02-2008 16:42:11