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@ARTICLE{Gasparyan:866096,
      author       = {Gasparyan, F. and Boichuk, Nazarii and Vitusevich, S.},
      title        = {{A}ctivation–relaxation processes and related effects in
                      quantum conductance of molecular junctions},
      journal      = {Nanotechnology},
      volume       = {31},
      number       = {4},
      issn         = {1361-6528},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {FZJ-2019-05315},
      pages        = {045001 -1-7},
      year         = {2020},
      abstract     = {We reveal the comparative relationship between small
                      changes in quantum conductivity behavior for molecular
                      junctions. We clarify the mechanisms of acquiring and losing
                      additional thermal activation energy during average current
                      flow in a gold-1,4 benzenediamine (BDA)-gold molecular
                      junction and explain the quantum conductance modulation
                      process. Small changes in working temperature lead to a
                      change in quantum conductivity, which is reflected in random
                      telegraph signal behavior. We demonstrate the high
                      sensitivity of the BDA molecules to small changes in
                      temperature. For BDA molecules, conductance
                      thermo-sensitivity values are relatively high near to
                      $\left(0.8\div1.6\right)\times {10}^{-7}\,{{\rm{\Omega
                      }}}^{-1}\,{{\rm{K}}}^{-1}.$ This advantage can be used to
                      measure weak variations in the ambient temperature. We show
                      that the additional thermal energy arising from the change
                      in temperature can impact on the strength of the
                      electrode-molecule coupling, on the modulation of quantum
                      conductivity. Local changes in quantum conductance of the
                      order of quanta or smaller are conditioned by small random
                      changes in the working regime arising from some of the
                      activation processes. On the basis of the modulation of
                      conductance, we calculate the magnitude of the spring
                      constant of the 1,4 benzenediamine molecule as
                      ${k}_{s}\approx 7.1\times
                      {10}^{-3}\,{\rm{N}}\,{{\rm{m}}}^{-1}$ at the stretching
                      length of 0.03 nm for the Au−NH2 molecular junction.},
      cin          = {ICS-8},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ICS-8-20110106},
      pnm          = {523 - Controlling Configuration-Based Phenomena (POF3-523)},
      pid          = {G:(DE-HGF)POF3-523},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:31610534},
      UT           = {WOS:000494690100001},
      doi          = {10.1088/1361-6528/ab4d96},
      url          = {https://juser.fz-juelich.de/record/866096},
}