Charge avalanches and depinning in the Coulomb glass: The role of long-range interactions
| Autor: | Gergely T. Zimanyi, Helmut G. Katzgraber, Yohanes Pramudya, Juan Carlos Andresen, Creighton K. Thomas, Vladimir Dobrosavljevic |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Phase transition Condensed matter physics FOS: Physical sciences Non-equilibrium thermodynamics Charge (physics) Disordered Systems and Neural Networks (cond-mat.dis-nn) Condensed Matter - Disordered Systems and Neural Networks Critical value 01 natural sciences 010305 fluids & plasmas Electric field Metastability 0103 physical sciences Coulomb 010306 general physics Critical field |
| Zdroj: | Physical Review B. 93 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.93.094429 |
| Popis: | We explore the stability of far-from-equilibrium metastable states of a three-dimensional Coulomb glass at zero temperature by studying charge avalanches triggered by a slowly varying external electric field. Surprisingly, we identify a sharply defined dynamical ("depinning") phase transition from stationary to nonstationary charge displacement at a critical value of the external electric field. Using particle-conserving dynamics, scale-free system-spanning avalanches are observed only at the critical field. We show that the qualitative features of this depinning transition are completely different for an equivalent short-range model, highlighting the key importance of long-range interactions for nonequilibrium dynamics of Coulomb glasses. 9 pages, 10 figures, 1 table, hell has frozen over |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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