Address: Park Angelinum 9, 04001 Košice
Phone: +421 55 234 2276

Academic titles and degrees:

  • 2000 – Master (Mgr.)
  • 2002 – Rerum Naturalium Doctor (RNDr.)
  • 2004 – Philosophiae  Doctor (PhD.)
  • 2010 – Assoc. prof. (Doc.)

Professional career:

  • 1995-2000: Undergraduate study at Faculty of Science, P.J. Šafárik University in Košice, field of study: physics-chemistry
  • 2000-2003: Postgraduate study at Faculty of Science, P.J. Šafárik University in Košice, field of study: condensed matter physics and acoustics
  • 2003-2004: Research assistant at Faculty of Science, P.J. Šafárik University in Košice
  • 2004-2008: Research associate at Faculty of Science, P.J. Šafárik University in Košice
  • 2008-2010: Senior researcher at Faculty of Science, P.J. Šafárik University in Košice
  • 2010-until now: Associate professor at Faculty of Science, P.J. Šafárik University in Košice
  • Foreign research stays and fellowships:
    • 04/2004-07/2004: Joint Institute for Nuclear Research (JINR), Dubna, Moscow region, Russia, prof. N. M. Plakida
    • 12/2007-01/2008: Research Center for Quantum Science Under Extreme Conditions (KYOKUGEN), Osaka University, Japan, JSPS fellowship with prof. M. Hagiwara
    • 08/2011-09/2011: Universidade Federal de Lavras, Lavras, Brazília, FAPEMIG fellowship with prof. Onofre Rojas
    • 01/2012-02/2012: Center for Quantum Science and Technology under Extreme Conditions (KYOKUGEN), Osaka University, Japan, Visiting research scholar with prof. M. Hagiwara


  • Quantum mechanics
  • Exactly solvable models in statistical physics
  • Quantum theory of magnetism
  • Quantum mechanics 2
  • Applications of graph theory in statistical physics

Monographs and textbooks:

  • J. Strečka, Exactly Solvable Models in Statistical Physics, P. J. Šafárik University in Košice, 2010, 101 pages, ISBN 9788070977958 (electronic textbook).


  • exactly solved models in statistical mechanics
  • classical and quantum theory of magnetism
  • phase transitions and critical phenomena
  • statistical mechanics of liquids

Selected publications:

  1. J. Strečka, M. Jaščur, Magnetic properties of exactly solvable doubly decorated Ising-Heisenberg planar models, Phys. Rev. B 66 (2002) 174415 (7 pages). IF2002=3.327
  2. J. Strečka, M. Jaščur, Existence of the magnetization plateau in a class of exactly solvable Ising-Heisenberg chains, J. Phys.: Condens. Matter 15 (2003) 4519-4534 (16 pages). IF2003=1.757
  3. J. Strečka, M. Jaščur, M. Hagiwara, K. Minami, Y. Narumi, K. Kindo, Thermodynamic properties of a tetramer Ising-Heisenberg bond alternating chain as a model system for Cu(3-Clpy)2(N3)2, Phys. Rev. B 72 (2005) 024459 (11 pages).
  4. L. Čanová, J. Strečka, M. Jaščur, Geometric frustration in the class of exactly solvable Ising–Heisenberg diamond chains, J. Phys.: Condens. Matter 18 (2006) 4967-4984 (18 pages). IF2006=2.038
  5. J. Strečka, Exact results of a mixed spin-1/2 and spin-S Ising model on a bathroom tile (4–8) lattice: Effect of uniaxial single-ion anisotropy, Physica A 360 (2006) 379-390 (12 pages). IF2006=1.311
  6. J. Strečka, L. Čanová, M. Jaščur, M. Hagiwara, Exact solution of the geometrically frustrated spin-1/2 Ising-Heisenberg model on the triangulated (triangles-in-triangles) lattice, Phys. Rev. B 78 (2008) 024427 (11 pages). IF2008=3.322
  7. J. Strečka, L. Čanová, K. Minami, Spin-1/2 Ising-Heisenberg model with the pair XYZ Heisenberg and quartic Ising interactions as the exactly soluble zero-field eight-vertex model, Phys. Rev. E 79 (2009) 051103 (11 pages); IF2009=2.400; Erratum: Phys. Rev. E 83 (2011) 069904(E).
  8. J. Strečka, Generalized algebraic transformations and exactly solvable classical-quantum models, Phys. Lett. A 374 (2010) 3718-3722 (5 pages). IF2010=1.963
  9. T. Verkholyak, J. Strečka, Quantum phase transitions in the exactly solved spin-1/2 Heisenberg-Ising ladder, J. Phys. A: Math. Theor. 45 (2012) 305001 (17 pages). IF2012=1.766
  10. J. Strečka, C. Ekiz, Reentrant phase transitions and multicompensation points in the mixed-spin Ising ferrimagnet on a decorated Bethe lattice, Physica A 391 (2012) 4763-4773 (11 pages). IF2012=1.676
  11. J. Čisárová, J. Strečka, Unconventional quantum ordered and disordered states in the highly frustrated Ising-Heisenberg model on triangles-in-triangles lattices, Phys. Rev. B 87 (2013) 024421 (15 pages). IF2013=3.664
  12. J. Čisárová, F. Michaud, F. Mila, J. Strečka, Intermediate magnetization plateaus in the spin-1/2 Ising-Heisenberg and Heisenberg models on two-dimensional triangulated lattices, Phys. Rev. B 87 (2013) 054419 (9 pages). IF2013=3.664
  13. O. Derzhko, J. Strečka, L. Gálisová, Compressibility of deformable spin chais near quantum critical points, Eur. Phys. J. B 86 (2013) 88 (9 pages). IF2013=1.463
  14. J. Strečka, O. Rojas, T. Verkholyak, M.L. Lyra, Magnetization process, bipartite entanglement, and enhanced magnetocaloric effect of the exactly solved spin-1/2 Ising-Heisenberg tetrahedral chain, Phys. Rev. E 89 (2014) 022143 (10 pages). IF2014=2.288
  15. T. Verkholyak, J. Strečka, F. Mila, K.P. Schmidt, Exact ground states of a spin-1/2 Ising-Heisenberg model on the Shastry-Sutherland lattice in a magnetic field, Phys. Rev. B 90 (2014) 134413 (14 pages). IF2014=3.736
  16. J. Strečka, H. Čenčariková, M.L. Lyra, Phase diagrams and anomalous thermodynamic behavior of a correlated spin-electron system on doubly decorated planar lattices, Phys. Lett. A 379 (2015) 2915-2921 (7 pages). IF2015=1.677
  17. L. Gálisová, J. Strečka, Vigorous thermal excitations in a double-tetrahedral chain of localized Ising spins and mobile electrons mimic a temperature-driven first-order phase transition, Phys. Rev. E 91 (2015) 022134 (9 pages). IF2015=2.252
  18. V. Ohanyan, O. Rojas, J. Strečka, S. Bellucci, Absence of actual plateaus in zero-temperature magnetization curves of quantum spin clusters and chains, Phys. Rev. B 92 (2015) 214423 (13 pages). IF2015=3.718
  19. T. Verkholyak, J. Strečka, Fractional magnetization plateaus of the spin-1/2 Heisenberg orthogonal-dimer chain: Strong-coupling approach developed from the exactly solved Ising-Heisenberg model, Phys. Rev. B 94 (2016) 144410 (13 pages). IF2016=3.836
  20. L. Lederová, A. Orendáčová, J. Chovan, J. Strečka, T. Verkholyak, R. Tarasenko, D. Legut, R. Sýkora, E. Čižmár, V. Tkáč, M. Orendáč, A. Feher, Realization of a spin-1/2 spatially anisotropic square lattice in a quasi-two-dimensional quantum antiferromagnet Cu(en)(H2O)2SO4, Phys. Rev. B 95 (2017) 054436 (12 pages). IF2017=3.813
  21. J. Strečka, J. Richter, O. Derzhko, T. Verkholyak, K. Karľová, Diversity of quantum ground states and quantum phase transitions of a spin-1/2 Heisenberg octahedral chain, Phys. Rev. B 95 (2017) 224415 (12 pages). IF2017=3.813
  22. J. Strečka, Strong- and Weak-Universal Critical Behaviour of a Mixed-Spin Ising Model with Triplet Interactions on the Union Jack (Centered Square) Lattice, Entropy 20 (2018) 91 (12 pages). IF2018=2.419
  23. J. Strečka, K. Karľová, V. Baliha, O. Derzhko, Ising versus Potts criticality in low-temperature magnetothermodynamics of a frustrated spin-1/2 Heisenberg triangular bilayer, Phys. Rev. B 98 (2018) 174426 (14 pages). IF2018=3.736
  24. H. Čenčariková, J. Strečka, Enhanced magnetoelectric effect of the exactly solved spin-electron model on a doubly decorated square lattice in the vicinity of a continuous phase transition, Phys. Rev. E 98 (2018) 062129 (7 pages). IF2018=2.353
  25. L.M. Veríssimo, M.S.S. Pereira, J. Strečka, M.L. Lyra, Kosterlitz-Thouless and Gaussian criticalities in a mixed spin-(1/2, 5/2, 1/2) Heisenberg branched chain with exchange anisotropy, Phys. Rev. B 99 (2019) 134408 (9 pages). IF2019=3.575
  26. O. Rojas, J. Strečka, M.L. Lyra, S.M. de Souza, Universality and quasicritical exponents of one-dimensional models displaying a quasitransition at finite temperatures, Phys. Rev. E 99 (2019) 042117 (10 pages). IF2019=2.296
  27. K. Karľová, J. Strečka, T. Verkholyak, Cluster-based Haldane phases, bound magnon crystals and quantum spin liquids of a mixed spin-1 and spin-1/2 Heisenberg octahedral chain, Phys. Rev. B 100 (2019) 094405 (12 pages). IF2019=3.575
  28. K. Karľová, J. Strečka, M.L. Lyra, Breakdown of intermediate one-half magnetization plateau of spin-1/2 Ising-Heisenberg and Heisenberg branched chains at triple and Kosterlitz-Thouless critical points, Phys. Rev. E 100 (2019) 042127 (12 pages). IF2019=2.296
  29. J. Strečka, L. Gálisová, T. Verkholyak, Enhanced magnetoelectric effect near a field-driven zero-temperature quantum phase transition of the spin-1/2 Heisenberg-Ising ladder, Phys. Rev. E 101 (2020) 012103 (5 pages). IF2020=
  30. J. Strečka, C. Ekiz, Nature of intermediate magnetization plateaus of a spin-1/2 Ising-Heisenberg model on a triangulated Husimi lattice resembling a triangulated kagome lattice, Phys. Rev. E 102 (2020) 012132 (11 pages). IF2020=


  • VEGA 1/9034/02 “A theoretical study of the selected molecular-based and low dimensional magnets”, 2002-2004, investigator.
  • VEGA 1/2009/05 “A theoretical study of the selected spin lattice systems”, 2005- 2007, investigator.
  • VEGA 1/0128/08 “A theoretical study of the quantum and classical spin systems”, 2008-2010, investigator.
  • VEGA 1/0431/10 “A study of quantum and cooperative phenomena in geometrical frustrated spin models”, 2010-2011, investigator.
  • VEGA 1/0234/12 “Frustrated spin systems”, 2012-2015, investigator.
  • APVT-20-009902 “ Low-dimensional magnetic materials”, 2002-2004, investigator.
  • APVT-20-005204 “ Magneto-structural correlations in unconventional magnetic materials “, 2005-2007, investigator.
  • APVV-0132-11 “Novel quantum states in nanoscopic magnetic systems“, 2012-2015, investigator.
  • LPP-0107-06 “Exactly solvable models and their usage by interpreting quantum phenomena in magnetism, non-universal critical behaviour and phase separation of liquid mixtures”, 2007-2009, investigator.
  • MVTS Ukr/SR/UPJŠ/08 “ Spin-Peierls phase transitions in the class of exactly soluble Ising-Heisenberg models”, 2008, investigator (Partner: prof. Oleg Derzhko).
  • VVGS 12/2006 “Exact study of critical phenomena in the mixed-spin Ising models“, 2006-2007, principal investigator
  • VVGS 23/07-08 “Metamagnetism of layered polymeric coordination compounds“, 2007-2008, principal investigator
  • VVGS 2/09-10 “Investigation of quantum „order-from-disorder“ effect in the class of exactly solvable geometrically frustrated Ising-Heisenberg models“, 2009-2010, principal investigator
  • VVGS 1/10-11 “Rigorous study of the non-universal critical behaviour in the family of the exactly solved Ising models with multispin interactions“, 2010-2011, principal investigator


  • Member of the Editorial board of foreign Current Contents journal: Condensed Matter Physics
  • Long-standing referee for foreign Current Contents journals (Physical Review, J. Physics: Condensed Matter, Journal of Physics: Mathematical and Theoretical Physics, Physica A, Journal of Magnetism and Magnetic Materials, The European Physical Journal B, Journal of Statistical Physics, Physica B, Physica status solidi (b), Physica Scripta, Phase Transitions )
  • Guarantor of doctoral study programme of General Physics and Mathematical Physics
  • Member of academic senate of Faculty of Science, P.J. Šafárik University in Košice (2007-until now)


  • 1st place in the Competition of Young Physicists (Slovak Physical Society, 2005)
  • Dean’s award for outstanding scientific-research activity (Faculty of Science, 2007)
  • 1st place in the Competition of Young Physicists (Slovak Physical Society, 2009)