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@ARTICLE{Banszerus:1053954,
      author       = {Banszerus, L. and Hecker, K. and Wang, L. and Möller, S.
                      and Watanabe, K. and Taniguchi, T. and Burkard, G. and Volk,
                      C. and Stampfer, C.},
      title        = {{P}honon-limited valley lifetimes in single-particle
                      bilayer graphene quantum dots},
      journal      = {Physical review / B},
      volume       = {112},
      number       = {3},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2026-01631},
      pages        = {035409},
      year         = {2025},
      abstract     = {The valley degree of freedom in two-dimensional (2D)
                      semiconductors, such as gapped bilayer graphene (BLG) and
                      transition metal dichalcogenides, is a promising carrier of
                      quantum information in the emerging field of valleytronics.
                      While valley dynamics have been extensively studied for
                      moderate band gap 2D semiconductors using optical
                      spectroscopy techniques, very little is known about valley
                      lifetimes in narrow band gap BLG, which is difficult to
                      study using optical techniques. Here, we report
                      single-particle valley relaxation times 𝑇1exceeding
                      several microseconds in electrostatically defined BLG
                      quantum dots using a pulse-gating technique. The observed
                      dependence of 𝑇1on perpendicular magnetic field can be
                      understood qualitatively and quantitatively by a model in
                      which 𝑇1is limited by electron-phonon coupling. We
                      identify the coupling to acoustic phonons via the bond
                      length change and via the deformation potential as the
                      limiting mechanisms.},
      cin          = {PGI-9 / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-9-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {5222 - Exploratory Qubits (POF4-522) / 2D4QT - 2D Materials
                      for Quantum Technology (820254) / DFG project
                      G:(GEPRIS)390534769 - EXC 2004: Materie und Licht für
                      Quanteninformation (ML4Q) (390534769)},
      pid          = {G:(DE-HGF)POF4-5222 / G:(EU-Grant)820254 /
                      G:(GEPRIS)390534769},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1103/dkgn-pfjb},
      url          = {https://juser.fz-juelich.de/record/1053954},
}