% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@INPROCEEDINGS{Corkett:1047033,
      author       = {Corkett, A. and Grzechnik, A. and Friese, K.},
      title        = {{T}ransition metal carbodiimides –{A} new playground for
                      solid-statephysics?},
      reportid     = {FZJ-2025-04084},
      year         = {2025},
      abstract     = {Transition metal oxides, particularly those with partially
                      filled 3d shells, have been the playgroundfor solid-state
                      physics for many decades. These correlated oxides exhibit a
                      competition betweencoulombic repulsion, which tends to
                      localize electrons, and hybridization, which promotes
                      delocalization,that leads to numerous many-body effects such
                      as metal-insulator transitions, colossalmagnetoresistance
                      and superconductivity, to name but a few. Traditionally the
                      modification of suchphases, to imbue different physical
                      properties, has relied on the doping of one cation for
                      another toadjust both the electron count and degree of
                      correlation. However, an alternative strategy may alsobe
                      employed via anion substitution. Enter the divalent
                      carbodiimide anion, <sup>−</sup>N=C=N<sup>−</sup>,which
                      is well considered a pseudo-oxide, but with enhanced
                      covalent character [1]. Indeed, numerousquasi-binary
                      transition metal carbodiimides,
                      M<sub>x</sub>(NCN)<sub>y</sub>, have nowbeen prepared,
                      including CuNCN which exhibits spin-liquid behavior and a
                      resonating-valencebond ground-state [2]. Here, however, we
                      will take a closer look at MnHf(NCN)<sub>3</sub>
                      andFeHf(NCN)<sub>3</sub>, which are the first examples of
                      transition metal carbodiimides with aperovskite-like
                      AB(NCN)<sub>3</sub> composition [3]. These quasi-ternary
                      phases adopt a chiralcrystal structure, with
                      P6<sub>3</sub>22 symmetry, and magnetometry measurements on
                      MnHf(NCN)<sub>3</sub>evidence strong AFM coupling of
                      Mn<sup>2+</sup> centers, but no evidence for long-range
                      order.This suggests a degree of magnetic frustration in
                      MnHf(NCN)<sub>3</sub> and highlights that thetypes of
                      quantum behavior observed in correlated oxides may also be
                      accessible to their carbodiimideanalogs.},
      month         = {Oct},
      date          = {2025-10-07},
      organization  = {JCNS Workshop 2025, Trends and
                       Perspectives in Neutron Scattering.
                       Quantum Materials: Theory and
                       Experiments, Evangelische Akademie
                       Tutzing (Germany), 7 Oct 2025 - 9 Oct
                       2025},
      subtyp        = {Invited},
      cin          = {JCNS-2 / JARA-FIT / JCNS-4},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / $I:(DE-82)080009_20140620$ /
                      I:(DE-Juel1)JCNS-4-20201012},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (FZJ) (POF4-6G4)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1047033},
}