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@ARTICLE{Volokitin:59065,
      author       = {Volokitin, A. I. and Persson, B. N. J. and Ueba, H.},
      title        = {{G}iant enhancement of noncontact friction between closely
                      spaced bodies by dielectric films and two-dimensional
                      systems},
      journal      = {Journal of experimental and theoretical physics},
      volume       = {104},
      issn         = {1063-7761},
      address      = {Heidelberg [u.a.]},
      publisher    = {Springer},
      reportid     = {PreJuSER-59065},
      pages        = {96 - 110},
      year         = {2007},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The effect of an external bias voltage and spatial
                      variations of the surface potential on the damping of
                      cantilever vibrations in an atomic force microscope (AFM) is
                      considered. The damping is due to an electrostatic friction
                      that arises due to dissipation of the energy of an
                      electromagnetic field generated in the sample by oscillating
                      static charges induced on the surface of the AFM probe tip
                      by the bias voltage or spatial variations of the surface
                      potential. A similar effect appears when the tip is
                      oscillating in an electrostatic field created by charged
                      defects present in the dielectric sample. The electrostatic
                      friction is compared to the van der Waals (vdW) friction
                      between closely spaced bodies, which is caused by a
                      fluctuating electromagnetic field related to the quantum and
                      thermal fluctuations of current density inside the bodies.
                      It is shown that the electrostatic friction and the vdW
                      friction can be strongly enhanced in the presence of
                      dielectric films or two-dimensional (2D) structures-such as
                      a 2D electron system or an incommensurate layer of adsorbed
                      ions exhibiting acoustic oscillations-on the probe tip and
                      sample surfaces. It is also shown that the damping of
                      cantilever oscillations caused by the electrostatic friction
                      in the presence of such 2D structures can have the same
                      order of magnitude and the same dependence on the distance
                      as observed in experiment by Stipe et al. [Phys. Rev. Lett.
                      87, 096801 (2001)]. At small distances, the vdW friction can
                      be large enough to be measured in experiment. In
                      interpreting the experimental data that obey a quadratic
                      dependence on the bias voltage, one can reject a phonon
                      mechanism according to which the friction depends on the
                      fourth power of the voltage.},
      keywords     = {J (WoSType)},
      cin          = {IFF-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB781},
      pnm          = {Kondensierte Materie},
      pid          = {G:(DE-Juel1)FUEK414},
      shelfmark    = {Physics, Multidisciplinary},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000244310300011},
      doi          = {10.1134/S1063776107010116},
      url          = {https://juser.fz-juelich.de/record/59065},
}