Theoretical Modeling of the Non-equilibrium Amorphous State in 1T-TaS2

  • Jaka VodebEmail author
  • Viktor V. Kabanov
  • Yaroslav A. Gerasimenko
  • Igor Vaskivskyi
  • Jan Ravnik
  • Dragan Mihailovic
Original Paper


1T-TaS2 is known for it’s remarkably complex phase diagram and it’s unique long-lived metastable hidden (H) state. Recently, a novel metastable state has been discovered using higher fluences for photoexcitation than in the case of the H state. The state has been dubbed as amorphous (A) due to it’s similarity to glass. Expanding on the work of Brazovskii and Karpov, we show that the A state can be successfully modeled with classical interacting polarons on a two dimensional hexagonal lattice. We have found that the polaron configuration of the A state corresponds to a frustrated screened Coulomb system, where there is no order-disorder phase transition.


Charge density waves Polarons Lattice gas model Monte Carlo simulations 



We wish to thank Tomaz Mertelj for the useful discussions. The work was supported by ERC-2012-ADG20120216 “Trajectory” and the Slovenian Research Agency (program P1-0040 and young researcher P0-8333).


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Authors and Affiliations

  1. 1.Jozef Stefan InstituteLjubljanaSlovenia
  2. 2.CENN NanocenterLjubljanaSlovenia
  3. 3.Department of Physics, Faculty for Mathematics and PhysicsUniversity of LjubljanaLjubljanaSlovenia

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