EXAFS Spectroscopy Laboratory (EXAFS Lab) has been re-established at the Institute of Solid State Physics, University of Latvia (ISSP UL) in 2020 and focuses on the study of materials structure using synchrotron radiation X-ray absorption spectroscopy.

The aim of the laboratory is to develop the method of X-ray absorption spectroscopy and its application in material science, to maintain high ISSP UL potential in the field and to expand further the ISSP UL cooperation with the existing and new European Union synchrotron radiation centers.

Our experimental possibilities include but are not limited to several techniques such as X-ray absorption spectroscopy, confocal spectromicroscopy and X-ray diffraction.

We use advanced theoretical calculations and simulations of experimental data to gain insight on the structure-property relationships in materials.

Our laboratory is also involved in the teaching process at the University of Latvia and provides students with opportunities to participate in research activities during Bachelor, Master and Doctoral level programs.

Scientific degree Name Surname Position Phone number E-mail
Dr.phys. Alexei Kuzmin Head of laboratory; Senior researcher 67251691 Aleksejs.Kuzmins@cfi.lu.lv
Dr.phys. Andris Anspoks Senior researcher   Andris.Anspoks@cfi.lu.lv
Dr.phys. Aleksandrs Kalinko Senior researcher 67251691 Aleksandrs.Kalinko@cfi.lu.lv
Dr.rer.nat. Georgijs Bakradze Researcher 67251691 Georgijs.Bakradze@cfi.lu.lv
MSc. Inga Jonane Research assistant 67251691 Inga.Jonane@cfi.lu.lv
MSc. Arturs Cintins Research assistant 67251691 Arturs.Cintins@cfi.lu.lv
  Vitalijs Dimitrijevs Engineer   Vitalijs.Dimitrijevs@cfi.lu.lv
  • Development of methods for the analysis and modelling of X-ray absorption spectra using different theoretical approaches.

We develop advanced data analysis methods for extracting structural information from X-ray absorption spectra. 

  • Development of new experimental methods and their applications in the field of X-ray absorption spectroscopy.

We are involved in the development and use of new experimental methods at synchrotron radiation centres.

  • Study of structural properties of different materials using synchrotron radiation X-ray absorption spectroscopy.

We conduct systematic studies based on synchrotron radiation X-ray absorption spectroscopy to better understand and optimize the functional properties of various materials

CAMART2 - H2020-WIDESPREAD-2014-1 (2017-2023).

EUROfusion:

"ODS steel with high creep strength", EUROfusion WPMAT - Advanced Steels Project (MAT-2.3.2-T005-D004), 2014-....

"When and how ODS particles are formed? - X-ray Absorption Spectroscopy and ab initio modelling of ODS steels", EUROfusion Enabling Research Project (CfP-WP15-ENR-01/UL-01) (2015-2017).

LSC grants:

X-ray absorption studies of metal hydrides under extreme pressure (2018-2020).

Development of X-ray sensitive hybrid organic-inorganic systems (2020-2022).

Postdoctoral Research Projects

Influence of crystallite size and composition on the formation of polarons in nanocrystalline tungstates (2020-2022).

  • The work “Neural network approach to EXAFS analysis” (doi: 10.1103/physrevlett.120.225502) was recognized among the best at the ELETTRA synchrotron center in 2018 and included in ELETTRA Highlights 2018-2019.
  • The work “Origin of pressure-induced metallization in Cu3N: an X-ray absorption spectroscopy study” (doi: 10.1002/pssb.201870141) was featured on Physica Status Solidi B journal cover.

Germany:

  • DESY/HASYLAB synchrotron center
  • Institute for Applied Materials-Applied Materials Physics
  • Karlsruhe Institute of Technology

France:

  • SOLEIL synchrotron center

Italy:

  • ELETTRA synchrotron center

Portugal

  • University of Minho

Spain:

  • ALBA synchrotron center

Sweden:

  • KTH
  • RISE Acreo

USA:

  • Stony Brook University

Hungary:

  • Wigner Research Centre for Physics

Russia:

  • Department of Chemistry, St.Petersburg State University
  • Joint Institute for Nuclear Research

2019.

I. Jonane, A. Anspoks, G. Aquilanti, A. Kuzmin, High-temperature X-ray absorption spectroscopy study of thermochromic copper molybdate, Acta Mater. 179 (2019) 26-35.

S. Rahman, S. Samanta, A. Kuzmin, D. Errandonea, H. Saqib, D.L. Brewe, J. Kim, J. Lu, L. Wang, Tuning the photoresponse of nano-heterojunction: Pressure-induced inverse photoconductance in functionalized WO3 nanocuboids, Adv. Sci. (2019) 1901132:1-9.

T. Schenk, A. Anspoks, I. Jonane, R. Ignatans, B.S. Johnson, J.L. Jones, M. Tallarida, C. Marini, L. Simonelli, P. Hönicke, C. Richter, T. Mikolajick, U. Schroeder, Local structural investigation of hafnia-zirconia polymorphs in powders and thin films by X-ray absorption spectroscopy, Acta Mater. 180 (2019) 158-169.

2018.

J.Timoshenko, A.Anspoks, A.Cintins, A.Kuzmin, J.Purans, A.I.Frenkel, Neural network approach for characterizing structural transformations by x‐ray absorption fine structure spectroscopy, Phys. Rev. Lett. 120 (2018) 225502:1‐6.

E. Butanovs, S. Vlassov, A. Kuzmin, S. Piskunov, J. Butikova, B. Polyakov, Fast-response single-nanowire photodetector based on ZnO/WS2 core/shell heterostructures, ACS Appl. Mater. Interfaces 10 (2018) 13869-13876.

I. Jonane, A. Anspoks, A. Kuzmin, Advanced approach to the local structure reconstruction and theory validation on the example of the W L3-edge extended X-ray absorption fine structure of tungsten, Modelling Simul. Mater. Sci. Eng. 26 (2018) 025004 (11 pp).

I. Jonane, A. Cintins, A. Kalinko, R. Chernikov, A. Kuzmin, Probing the thermochromic phase transition in CuMoO4 by EXAFS spectroscopy, Phys. Status Solidi B 255 (2018) 1800074:1-5.

A. Kuzmin, A. Anspoks, A. Kalinko, J. Timoshenko, L. Nataf, F. Baudelet, T. Irifune, Origin of pressure-induced metallization in Cu3N: an X-ray absorption spectroscopy study, Phys. Status Solidi B 255 (2018) 1800073:1-6.

2017.

J. Timoshenko, A. Anspoks, A. Kalinko, A. Kuzmin, Thermal disorder and correlation effects in anti-perovskite-type copper nitride, Acta Mater. 129 (2017) 61-71.

B. Polyakov, A. Kuzmin, S. Vlassov, E. Butanovs, J. Zideluns, J. Butikova, R. Kalendarev, M. Zubkins, A comparative study of heterostructured CuO/CuWO4 nanowires and thin films, J. Cryst. Growth 480 (2017) 78-84.