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@ARTICLE{Bouaziz:888888,
      author       = {Bouaziz, Juba and Ibañez-Azpiroz, Julen and Guimarães,
                      Filipe S. M. and Lounis, Samir},
      title        = {{Z}ero-point magnetic exchange interactions},
      journal      = {Physical review research},
      volume       = {2},
      number       = {4},
      issn         = {2643-1564},
      address      = {College Park, MD},
      publisher    = {APS},
      reportid     = {FZJ-2020-05293},
      pages        = {043357},
      year         = {2020},
      abstract     = {Quantum fluctuations are ubiquitous in physics. Ranging
                      from conventional examples like the harmonic oscillator to
                      intricate theories on the origin of the universe, they alter
                      virtually all aspects of matter, including
                      superconductivity, phase transitions, and nanoscale
                      processes. As a rule of thumb, the smaller the object, the
                      larger its impact. This poses a serious challenge to modern
                      nanotechnology, which aims at total control via atom-by-atom
                      engineered devices. In magnetic nanostructures, high
                      stability of the magnetic signal is crucial when targeting
                      realistic applications in information technology, e.g.,
                      miniaturized bits. Here we show that zero-point spin
                      fluctuations play an important role in determining the
                      fundamental magnetic exchange interactions that dictate the
                      nature and stability of the magnetic state. Based on the
                      fluctuation-dissipation theorem, we show that quantum
                      fluctuations correctly account for the large overestimation
                      of the interactions as obtained from conventional static
                      first-principles frameworks, filling in an important gap
                      between theory and experiment [Zhou et al., Nat. Phys. 6,
                      187 (2010); Khajetoorians et al., Nat. Phys. 8, 497 (2012)].
                      Our analysis further reveals that zero-point spin
                      fluctuations tend to promote the noncollinearity and
                      stability of chiral magnetic textures such as skyrmions, a
                      counterintuitive quantum effect that inspires practical
                      guidelines for designing disruptive nanodevices.},
      cin          = {IAS-1 / PGI-1 / JARA-FIT / JARA-HPC / JSC},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106 /
                      $I:(DE-82)080009_20140620$ / $I:(DE-82)080012_20140620$ /
                      I:(DE-Juel1)JSC-20090406},
      pnm          = {142 - Controlling Spin-Based Phenomena (POF3-142) /
                      First-principles investigation of single magnetic
                      nano-skyrmions $(jias17_20190501)$},
      pid          = {G:(DE-HGF)POF3-142 / $G:(DE-Juel1)jias17_20190501$},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000605497000007},
      doi          = {10.1103/PhysRevResearch.2.043357},
      url          = {https://juser.fz-juelich.de/record/888888},
}