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@ARTICLE{Cichy:598716,
      author       = {Cichy, Agnieszka and Kapcia, Konrad and Ptok, Andrzej},
      title        = {{S}pin-polarized superconducting phase in semiconducting
                      system with next-nearest-neighbor hopping on the honeycomb
                      lattice},
      journal      = {Journal of magnetism and magnetic materials},
      volume       = {589},
      issn         = {0304-8853},
      address      = {Amsterdam},
      publisher    = {North-Holland Publ. Co.},
      reportid     = {PUBDB-2023-06971},
      pages        = {171522},
      year         = {2024},
      abstract     = {The particles in the honeycomb lattice with on-site
                      𝑠-wave pairing exhibit many interesting behaviors, which
                      can be described in the framework of the Hubbard model.
                      Among others, at the half-filling, some critical value
                      |𝑈$_𝑐$| of pairing interaction 𝑈 < 0 exists that,
                      for 𝑈 < 𝑈$_𝑐$ , the superconducting phase becomes
                      unstable. Introduction of the nonzero hopping 𝑡′
                      between next-nearest-neighbor sites strongly modifies the
                      physical properties of the system. Here, we discuss the
                      behavior of the system for 𝑡′ ≠ 0 (at the ground
                      state),where the hopping between next-nearest neighbors
                      leads to change of the order of phase transition between
                      superconducting and normal phases from discontinuous to
                      continuous one in the external magnetic field ℎ. We show
                      that this behavior is strongly dependent on 𝑡′ and
                      associated with the Dirac cones in the non-interacting band
                      structure of the system. For non-zero magnetic field and for
                      some range of 𝑡′, a spin-polarized superconducting
                      phase occurs in the ground state phase diagram (only at the
                      half-filling and for ℎ ≠ 0).},
      cin          = {FS-CFEL-XM},
      ddc          = {530},
      cid          = {I:(DE-H253)FS-CFEL-XM-20210408},
      pnm          = {631 - Matter – Dynamics, Mechanisms and Control
                      (POF4-631)},
      pid          = {G:(DE-HGF)POF4-631},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001123689500001},
      doi          = {10.1016/j.jmmm.2023.171522},
      url          = {https://bib-pubdb1.desy.de/record/598716},
}