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@ARTICLE{Reich:1043251,
      author       = {Reich, Adrian and Shapiro, Dmitrii and Shnirman, Alexander},
      title        = {{B}erezinskii-{K}osterlitz-{T}houless transitions in a
                      topological superconductor-ferromagnet-superconductor
                      junction},
      journal      = {Physical review / B},
      volume       = {111},
      number       = {20},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2025-02801},
      pages        = {205428},
      year         = {2025},
      abstract     = {We investigate quantum phase transitions in a topological
                      Josephson junction with an embedded ferromagnetic layer,
                      revealing a rich landscape of critical phenomena. The
                      low-energy excitations comprise Majorana fermions
                      propagating along the junction, coupled to the magnons in
                      the ferromagnet. Based on mean-field and renormalization
                      group arguments, we predict Berezinskii-Kosterlitz-Thouless
                      (BKT) transitions in this system, both in the case of a
                      magnetic easy-plane and weak easy-axis anisotropy. In the
                      latter case, this is based on an emergent effective easy
                      plane, spanned by the easy axis and the component of the
                      magnetization, which couples to the Majoranas. We conclude
                      by presenting a conjecture for the full phase diagram of the
                      model. It covers BKT transitions as well as exotic
                      multicritical and supersymmetric points known from related
                      models of interacting real fermions and bosons.},
      cin          = {PGI-12},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-12-20200716},
      pnm          = {5223 - Quantum-Computer Control Systems and Cryoelectronics
                      (POF4-522)},
      pid          = {G:(DE-HGF)POF4-5223},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001501238000004},
      doi          = {10.1103/PhysRevB.111.205428},
      url          = {https://juser.fz-juelich.de/record/1043251},
}