E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it.
Phone: +36 1 3722812 (office)
6412 (from the university)
+36 30 8246082 (mobile)
Address: Department of Materials Physics,
Eötvös University,
Pázmány Péter sétány 1/a.,Hungary,
Room: 4.73
Previous address: 
(until July 2011)
High Temperature Materials Group,
Nuclear Energy and Safety
Research Department
Paul Scherrer Institute,
CH-5232 Villigen PSI,


My primary interests:
  • Dislocation avalanches and size effects
  • Dislocation patterns
  • Dislocation correlations and their evolution
  • Collective dynamics of dislocations (yielding- and relaxation-related phenomena)
  • High temperature phenomena, especially recovery and creep
  • Continuum models of plasticity
  • Particle strengthening of metals
  • Development of efficient dislocation dynamics simulations

Research opportunities for students:

Curriculum Vitæ (as of October 2013):


  1. Sz. Kalácska, I. Groma, A. Borbély and P. D. Ispánovity, Comparison of the dislocation density obtained by HR-EBSD and X-ray profile analysis, subitted (2016) [e-print]
  2. D. Tüzes, M. Zaiser and P. D. Ispánovity, Disorder is good for you: The influence of local disorder on strain localization and ductility of strain softening materials, submited (2016) [e-print]
  3. Á. Hegyi, P. D. Ispánovity, M. Knapek, D. Tüzes, K. Máthis, F. Chmelík, Z. Dankházi, G. Varga and I. Groma, Micron-scale deformation: a coupled in-situ study of strain bursts and acoustic emission, submitted (2016) [e-print]
  4. P. D. Ispánovity, D. Tüzes, P. Szabó, M. Zaiser and István Groma, The role of weakest links and system size scaling in multiscale modeling of stochastic plasticity, submitted (2016) [e-print]
  5. I. Groma, M. Zaiser and P. D. Ispanovity, Dislocation patterning in a two-dimensional continuum theory of dislocations, Phys. Rev. B 93, 214110 (2016) [e-print]
  6. I. Groma, Z. Vandrus and P. D. Ispánovity, Scale-free phase field theory of dislocations, Phys. Rev. Lett. 114, 015503 (2015) [e-print]
  7. P. Szabó, P. D. Ispánovity and I. Groma, Plastic strain is a mixture of avalanches and quasireversible deformations: Study of various sizes, Phys. Rev. B 91, 054106 (2015) [e-print]
  8. P. D. Ispánovity, L. Laurson, M. Zaiser, I. Groma, S. Zapperi and M. J. Alava, Avalanches in 2D Dislocation Systems: Plastic Yielding is not Depinning, Phys. Rev. Lett. 112, 235501 (2014) [e-print]
  9. Zs. Kovács, M. Ezzeldien, K. Máthis, P. D. Ispánovity, F. Chmelík and J. Lendvai, Statistical analysis of acoustic emission events in torsional deformation of a Vitreloy bulk metallic glass, Acta Mater. 70, 113 (2014)
  10. P. D. Ispánovity, Á. Hegyi, I. Groma, G. Györgyi, K. Ratter and D. Weygand, Average yielding and weakest link statistics in micron-scale plasticity, Acta Mater. 61, 6234 (2013) [e-print]
  11. I. Groma, D. Tüzes and P. D. Ispánovity, Asymmetric X-ray line broadening caused by dislocation polarization induced by external load, Scripta Mater. 68, 755 (2013)
  12. I. Groma, G. Györgyi and P. D. Ispánovity, Comment on “Dislocations Jam at Any Density”, Phys. Rev. Lett. 108, 269601 (2012)
  13. P. D. Ispánovity, B. Bakó, D. Weygand, W. Hoffelner and M. Samaras, Impact of gamma' particle coarsening on the critical resolved shear stress of nickel-base superalloys with low aluminium and/or titanium content, J. Nucl. Mater. 416, 55 (2011) [e-print]
  14. P. D. Ispánovity, I. Groma, G. Györgyi, P. Szabó and W. Hoffelner, Criticality of relaxation in dislocation systems, Phys. Rev. Lett. 107, 085506 (2011) [e-print]
  15. P. D. Ispánovity, I. Groma, W. Hoffelner and M. Samaras, Abnormal subgrain growth in a dislocation-based model of recovery, Model. Simul. Mater. Sc. 19, 045008 (2011) [e-print]
  16. I. Groma, G. Györgyi and P. D. Ispánovity, Variational approach in dislocation theory, Philos. Mag. 90, 3679 (2010). [e-print]
  17. P. D. Ispánovity, I. Groma, G. Györgyi, F. F. Csikor and D. Weygand, Submicron plasticity: yield stress, dislocation avalanches, and velocity distribution, Phys. Rev. Lett. 105, 085503 (2010). [e-print]
  18. F. F. Csikor, M. Zaiser, P. D. Ispánovity and I. Groma, The role of density fluctuations in the relaxation of random dislocation systems, J. Stat. Mech. P03036 (2009). [e-print]
  19. P. D. Ispánovity and I. Groma, The probability distribution of internal stresses in externally loaded 2D dislocation systems, J. Stat. Mech. P12009 (2008). [e-print]
  20. P. D. Ispánovity, I. Groma and G. Györgyi, Evolution of the correlation functions in two-dimensional dislocation systems, Phys. Rev. B 78, 024119 (2008). [e-print]
  21. I. Groma and P. D. Ispánovity, Role of elastic anharmonicity in dislocation patterning, Phys. Rev. B 76, 054120 (2007).

Pdf version of the papers can be downloaded here.



Last Updated on October 30 2016.