• High-energy spectroscopy of ternary intermetallic compounds based on rare earth and d-transition metals.
• Study of the valence state of ions of rare earth elements in compounds with valence instability.
• Electronic structure and chemical bond of oxide compounds.

Monographs, textbooks, manuals:

1. I.D.Shcherba, High Energy – Spectroscopy of Compounds, INFU of Lviv, 2018, 304 p. ISBN 978-617-10-0444-3
2. I.D.Shcherba, High Energy – Spectroscopy of Materials, Cracow – Lviv, 2016, 226 p. ISBN 978-966-613-929-3
3. Perechodnyje metaly i ich sojedinienia. Elektronnaja struktura i swojsntwa. (Editors: I.Shcherba, F.Skrypnyk, M.Ristic) Belgrad, Yugoslavia, SANU-1985.179 p.
4. Ristic, Ya.Dutchak, I.Shcherba. Stabilność, prewraszczenija i fazowyje rawnowiesija metaliczeskich sistem//Belgrad, Yugoslavia, SANY.-1988.-129 s.

Articles:

1. Crystal structure, X-ray emission properties and 57Fe Mössbauer spectra of TaFeP / I. Shcherba, O. Zhak, H. Noga, V. N. Antonov, L. Bekenov, V. Babizhetskyy, K Komedera, M. Kowalski, M. Kachmar, B. Jatsyk  // Z. Naturforsch., B: J. Chem. Sci. – 2025. – 80b, 9-10. – P. 367-374. – DOI.
2. Electron transport properties of Eu(Cu1-xAgx)2Si2 (0 ≤ x ≤ 1): initiation of transition Eu2+ ↔ Eu2.41+ in the intermediate valence state / B. Kuzhel, B. Belan, R. Gladyshevskii, H. Noga, I. Shcherba, R. Serkiz // Advances in Condensed Matter Physics. – 2024. – Vol. 2024 . – 5127659   (1-11) – DOI.
3. Thermopower of the CeNi4Cu compound with unstable valence of Ce / Koterlyn M.D., Noga, H., Koterlyn G.M., Shcherba I.D. // Journal of Alloys and Compounds. – 2024. – 997, . – P. 147471.
4. Possible Intelligent Materials Based on Compounds with Valence-Unstable Rare-Earth Elements / Shcherba I.D., Noga H., Bekenov L.V. // Metallofizika i Noveishie Tekhnologii. – 2024. – 46(1).
5. Intermediate valence behavior of the ternary cerium-nickel-phosphide Ce2Ni12P5 / I. Shcherba, V. Babizhetskyy, V. N. Antonov, H. Noga, O. Zhak, L. Bekenov, J. Kohler, R. K. Kremer, B. Kuzhel, M. Jasinski // Journal of Electron Spectroscopy and Related Phenomena. – 2024. – Vol. 274. – 147471 – DOI.
6. X-ray spectroscopic properties and electronic structure of Ca3Ga2Ge4O14 / I.D. Shcherba, L.V. Kostyk, L.V. Bekenov, M. Rudko, D. Uskokovic, H. Noga, R. M. Bilyk, B. M. Yatcyk, V. A. Denys. // J. Phys. Stud. – 2022. – 26, 4. – P. 4701-1-4701-6. – DOI.
7. Z. Shpyrka, A. Ivanushko, І. Shcherba, V. Denys, Електронна структура та особливості Х-променевих спектрів сполук RSCGE (R = CE, SM, EU)// Вісник Львівського університету. Серія хімічна. Ві№ 61 (2020)ВИПУСК 61, Ч. I.
8. I. D. Shcherba, V. N. Antonov, O. V. Zhak, L. V. Bekenov, M. V. Kovalska, H. Noga, D. Uskokovic, B.Yatcyk Electronic  Structure and X-ray Spectroscopic  Properties  of the HfFe₂Si₂ Compound _2019,  2301 (7 p.) Journal of Physical Studies vol. 23, number 2
9. I. Shcherba, L. Romaka, A. Skoblik, B. Kuzel, H. Noga, L. Bekenov, Yu. Stadnyk, P. Demchenko, A. Horyn. Structural Study, M?ssbauer Spectra and Electrical Properties of R₅Fe₆Sn₁₈ (R = Tm, Lu) Compounds//Acta Phys. Pol A, 2019 page158-163. (Impact Factor:  0.857)
10. I.  D. Shcherba, L.V.Kostyk, H. Noga, L.V. Bekenov, D. Uskokovic, B. M. Jatsyk X-ray spectra and electronic structure of the Ca₃Ga₂Ge₃О₁₂ compound//Solid State Sciences Volume 71, September 2017, Pages 1-2. (Impact Factor: 2.434)
11. Shcherba  I.D., Bekenov L.V., Antonov V.N., Noga H., Uskokovic D., Zhak O., Kovalska M.V. Electronic structure and X-ray spectroscopic properties of YbNi₂P₂//J. of Electron Spectroscopy and Related Phenomena – 2016. – Vol. 212. –P. 5–10. (Impact Factor: 1.468)
12. M. Lytvyn, S. Mudry and I. Shcherba, Influence of small addions of Co on density and surface properties of liquid tin// Annales Universitatis Paedagogicae Cracoviensis Studia Technica. Folia181, No IX, 2016, p.42-49.
13. Yulia S. Nykyruy, Ivan D.Shcherba, Stepan I. Mudry. Laser induced structure transformation in Fe-Cu-Nb-Si-B amorphous alloy//Annales Universitatis Paedagogicae Cracoviensis Studia Technica. Folia180, No VIII, 2015, p. 112-119.
14. Ivan D. Shcherba, et. all X-Ray and Messbauer Spectra and Electronic Structure of ScFe₂Si₂ Compound //J. Science Materials and Engineering B 5(1-2) (2015) 42-49.
15. Yulia S. Nykyruy, Ivan D. Shcherba, Stepan Mudry//Laser induced structure transformation in Fe-Cu-Nb-Si-B amorphous alloy. Annales Akademie Paedagogicae Cracoviensis/ Studia Technica III, 59, Cracow, 2014. – P.87-91.
16. D.Shcherba, D.Uskokovic, V.M.Antonov, B.Ja.Kotur, M. Sacharevych, A.Stosyk, B.M.Jatcyk// Electron srructure of ScFe₂Si₂ compound: Theory and experiment // Annales Akademie Paedagogicae Cracoviensis/ Studia Technica III, 58, Cracow, 2013. – P.112-118.
17. Iwan D.Szczerba, Bogdan M.Jacyk, Andrzej O. Stosyk. Struktura elektronowa  galidow miedzi//Annales Universitatis Paedagogicae Crakoviensis Studia Technica V (2012) Folia 97, p.191-196.
18. Mudry S., Shtablavyi , Shcherba I. Liquid eutectic alloys as a cluster solution// Archives of Materials Science and Engineering –2008. – Vol. 34, Issue 1.– P. 14-18.
19. Gorelenko, R. Matviishyn, I. Shcherba, V. Pavlyuk, R. Serkiz. Crystal structure, electron structure and physical properties of RM₅Si₃ compounds, R = Y, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu; M = Ni, Co//Chemistry of  Metals and Alloys//,  Vol. 2, Issue 1-2, pages 18-24, June 2009.
20. Koterlyn, I. Shcherba, R. Yasnitskii and G. Koterlyn. Peculiarities of the intermediate valence state of Ce in CeM₂Si₂ (M = Fe, Co, Ni) compounds// J. of Alloys and Compounds (2007). Vol.442. Issues 1-2. P. 176-179.
21. Kuzel B.S., Shcherba I.D., Kravczenko I. The contribution of valence unstable ytterbium states into kinetic properties of  YbNi_2-xGe_2+x  and      YbCu_2-xSi_2+x //J. of Alloys and Compounds Vol.425. 2006. P.54-58.
22. І.D.Shcherba, V.M.Antonov, L.O.Dobrjanska. Valence State of Ce and Electron Structure of CeM₂P₂ (Fe, Co, Ni) Compounds//Science of Sintering: Current Problems and New Trends.2003. Yugoslavia.  P.359-366.
23. D.Shcherba, V.V.Nemoshkalenko, V.M.Antonov, L.O.Dobrjans’ka, D.M.Bilyk. Peculiarities of electron structure of R.E.M₂P₂ (R.E.=Y, Ce; M=Fe, Co, Ni, Pd, Rh) components// J. of Electron Spectroscopy and Related Phenomenon 11(2003). P. 125-132.
24. D.Shcherba, J. Szuber, G.Czempic, A. Senkevich, I. Kravczenko Electronic structure of SnO₂  // Phуsica Status Solidi B. –  2003. – 238, N1. – P.7– 10.
25. Yu.Gorelenko, I.Shcherba, Yu. Stadnyk, L.Romaka, L.Dobrjanska, B.Jatsyk, O.Bodak, O.Kharchenko. Magnetic properties and electronic structure of RCo₉Si₄ compounds (R=Sm, Y, Gd, Tb)// Mag. & Mag. Mat. 2001. 192/193, pp 49-53.
26. V. Skolozdra, I.D.Shcherba at. all. Magnetic properties, electronic structure and X-ray spectra of RCo₉Si₄ compounds //J. of Alloys and Compounds 296, 2000, pp. 272-275.
27. I.Bodak, Yu.K.Gorelenko, V.I.Yarovets, I.D.Shcherba, G.A.Mel’nik, L.O.Dobryanska, and R.V.Skolozdra. Crystal Structure, Interatomic Distances, and X-ray Spectra of the Compounds RM₂Si₂, R₂M₃Si₅, and RMSi₃ (R= Rare Earth, M=Transition Metal) – Inorganic Materials, Vol.35, No4, 1999, pp.360-367.
28. Koterlyn, I.D.Shcherba. Ja.Kalyczak. Osobennosti transportnych i magnitnych swojstw sojedunienij YbNi₄In i YbNiIn₄ s walentno-nestabilnym Yb//FTT(Physics Solid State), 1999, Vol. 41, No 11, pp.1918-1921.
29. D.Shcherba, V.M. Antonov, L.O.Dobrianska Electronic structure of YM₂P₂ compounds // J. of Alloys and Compounds, vol.286, (1999), pp.56-60.
30. Shcherba, M.Koterlyn. Peculiriaties of the valence state of Ce and Yb in RM₄Al₈ (R=rare earth; M=Cr, Mn, Fe, Cu) //J. of Magn. & Magn. Mat. 157/158 (1996), pp.688-689.
31. Shcherba, V.Antonov. X-ray Spectra and Electronic structure of the Compound in the Zr-Co-Si System.// Phys. Stat. Sol. B. 198, 761, (1996).
32. Gladyshewskyj E., Yu.K.Gorelenko, I.D.Shcherba,V.I.Yarovets. Analiz mezatomnych rastojanuj perechodnoj metal-kremnij i tipow chimiczeskoj swiazi w silicidach perechodnych metallow// Inorganic Materials. Vol. 31. No 1. Pp.63-66.
33. Shcherba, M.Ridosh, V.Sinjushko. The peculiarities of the emission spectra of gallium garnets // J. of Alloys and Compounds -1992. -179. -p. 137-140.
34. Shcherba, L.Knygenko, Yu.Gorylenko. Rengenowskije spektry i magnitnyje swojstwa sojedinienij RMn₂Si₂// FMM (The Physics of Metals and Metallographic) -1992. -Vol. 12, Pp. 143-145.
35. Siczewycz O., Gryn Yu., Shcherba I. Struktura i fiziczeskije swojstwa sojedinienija EuCo₆Ga_2.4 // FMM (The Physics of Metals and Metallographic) -1992. –Vol.6. Pp. 156-157.
36. V. Nemoszkalenko, I.Shcherba, A.Szpak. Elektronno-energetyczna struktura spoluk RCu₂Si₂ // Bulletin of National Academy of Sciences of Ukraine -1992. №8, p.80-83.
37. Koterlin M., Morokhivski B, Shcherba I. New Ce Kondo lattices in compounds of the systems Ce-Ni-Ga // J. Serb. Chem. Soc. -1991. – 56(12). – p.733-737.
38. Dutchak Ya., Shcherba I., Ridosh M., Stepanov A., Shulakov A. Elektronnoje strojenije galijewych granatow R₃Ga₅O₁₂ //FTT/(Physics Solid State). – 1990. – T.32. N 2. –p.610-612.
39. Shcherba, B.Kotur. Rentgenowskije spektry, chimiczeskaja swiaz i elektronnaja struktura sojedinienij ScM₂Si₂ (M=Fe, Co, Ni). //Crystallography Reports -1990.-т.35. wyp.1 с.223-225.
40. Shcherba, L.Nikolaev X-ray spectra and chemical bond of Fe-Al-Si alloys.//Science of sintering. 1987.-19.N2.- p.101-105.
41. Ristich, Ya.Dutchak, I.Shcherba, Y.Gorelenko, Crystal structure, X-ray spectra of system R-Co-Si //Bull. VCII de I’ Academic Serba des sciences fech. -1987. -27. p. 33-43.
42. Trofimowa, I.Shcherba, Y.Gorelenko. Rentgenowskije spektry i elektronnaja struktura sojedinienij tipa R₂Fe₃Si₅.// FMM (The Physics of Metals and Metallographic) -1987. -Vol.63. N 5. p.880-884.
43. Shcherba, Y.Gorelenko, Ya.Dutchak, M.Ristic, X-ray spectra and electronic structure of R₂M₃Si₅ compounds // J. of the Less-Common Metals. 1986. -123. P. 85-88.
44. Kawicz J., Shcherba I., Rengenospektralnoje issledowanije elektronnoj strukrury gallidow itrija // FMM (The Physics of Metals and Metallographic) -1981. – vol. 51. N 5. p. 962-965.

Ivan D. Shcherba was born in the Zymna Voda village of Lviv region, in 1950. He received the M.S. degree in physics from the Ivan Franko National University of Lviv, Ukraine, in 1972. Since 1976 he has been with the Department of Metal Physics of the Ivan Franko National University of Lviv, where he became a Professor in 2001. He received the Ph.D. and Dr. Sc. degrees in physics from the above university in 1981 and 1993, respectively. His current research interests are mainly in the field of the high-energy spectroscopy of metals and alloys. He has published over 165 papers in professional journals and three monographs. Professor Shcherba participated in 75 international scientific conferences in Austria, Belgium, Germany, Poland, USA, France and other countries.

Professor Shcherba is active supporter of the ethnical revival of the Lemkivshchyna (Poland) where from are his parents. He was the President of the World Federation of Ukrainian Lemko Unions (SFULO) in 2002-2007, the Chair of five SFULO Scientific Conferences and three Congresses. He is the author of over 50 publications on the Lemkos problematic. Professor Shcherba is the Member of the Shevchenko Scientific Society, Ukrainian Physical Society and Polish Synchrotron Society.

Member of the Pustomyty District Council of the two democratic congresses. For significant contribution to the strengthening of interethnic relations in Ukraine and abroad, for active participation in the development of a democratic society, for the preservation of the Lemko customs and traditions, Ivan Shcherba was awarded the distinction of the State Committee of Ukraine for Nationalities and Migration.

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