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@ARTICLE{Heuer:845651,
      author       = {Heuer, Andreas and Schroer, Carsten F. E. and Diddens,
                      Diddo and Rehwald, Christian and Blank-Burian, Markus},
      title        = {{N}onlinear response from the perspective of energy
                      landscapes and beyond},
      journal      = {European physical journal special topics},
      volume       = {226},
      number       = {14},
      issn         = {1951-6401},
      address      = {Berlin},
      publisher    = {Springer},
      reportid     = {FZJ-2018-02867},
      pages        = {3061 - 3078},
      year         = {2017},
      abstract     = {The paper discusses the nonlinear response of disordered
                      systems. In particular we show how the nonlinear response
                      can be interpreted in terms of properties of the potential
                      energy landscape. It is shown why the use of relatively
                      small systems is very helpful for this approach. For a
                      standard model system we check which system sizes are
                      particular suited. In case of the driving of a single
                      particle via an external force the concept of an effective
                      temperature helps to scale the force dependence for
                      different temperature on a single master curve. In all cases
                      the mobility increases with increasing external force. These
                      results are compared with a stochastic process described by
                      a 1d Langevin equation where a similar scaling is observed.
                      Furthermore it is shown that for different classes of
                      disordered systems the mobility can also decrease with
                      increasing force. The results can be related to the
                      properties of the chosen potential energy landscape.
                      Finally, results for the crossover from the linear to the
                      nonlinear conductivity of ionic liquids are presented,
                      inspired by recent experimental results in the Roling group.
                      Apart from a standard imidazolium-based ionic liquid we
                      study a system which is characterized by a low conductivity
                      as compared to other ionic liquids and very small nonlinear
                      effects. We show via a real space structural analysis that
                      for this system a particularly strong pair formation is
                      observed and that the strength of the pair formation is
                      insensitive to the application of strong electric fields.
                      Consequences of this observation are discussed.},
      cin          = {IEK-12},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-12-20141217},
      pnm          = {131 - Electrochemical Storage (POF3-131)},
      pid          = {G:(DE-HGF)POF3-131},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000407636700005},
      doi          = {10.1140/epjst/e2017-70080-x},
      url          = {https://juser.fz-juelich.de/record/845651},
}