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@ARTICLE{Grzechnik:202457,
      author       = {Grzechnik, A. and Ueda, Y. and Yamauchi, T. and Hanfland,
                      M. and Hering, P. and Potapkin, V. and Friese, K.},
      title        = {{S}tructural stability of the {W}adsley-type bronzes β −
                      {A}g $_{0.33}$ {V} $_{2}$ {O} $_{5}$ and β − {L}i
                      $_{0.33}$ {V} $_{2}$ {O} $_{5}$ on compression: {A}
                      breakdown of the two-leg ladder system in the
                      nonsuperconducting high-pressure phase of β − {L}i
                      $_{0.33}$ {V} $_{2}$ {O} $_{5}$},
      journal      = {Physical review / B},
      volume       = {91},
      number       = {17},
      issn         = {1098-0121},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {FZJ-2015-04671},
      pages        = {174113},
      year         = {2015},
      abstract     = {Structural stabilities of the Wadsley-type bronzes
                      β−Ag0.33V2O5 and β−Li0.33V2O5 (both C2/m, Z = 6) have
                      been studied with single-crystal x-ray diffraction in
                      diamond anvil cells at room temperature to 8 and 13 GPa,
                      respectively. β−Ag0.33V2O5 is stable at least to 8 GPa.
                      β−Li0.33V2O5 undergoes two phase transitions at about 9
                      and 11 GPa due to relative displacements of the adjacent
                      octahedral vanadate layers. In the intermediate phase
                      between 9 and 11 GPa, very strong one-dimensional diffuse
                      scattering is observed, indicating the presence of stacking
                      faults. The structural refinements (C2/m, Z = 6) of the data
                      above 11 GPa reveal that the layers of VO6 octahedra remain
                      essentially intact. However, the relative position of the
                      chains of edge-sharing VO5 tetragonal pyramids with respect
                      to the octahedral layers is changed. As a result, the
                      tunnels populated by the Li1+ cations collapse on
                      compression. The distribution of the Li1+ cations in the
                      vanadate framework is fully ordered in the polymorph above
                      11 GPa. The present structural data could be used to better
                      understand the pressure-induced superconductivity in all the
                      Wadsley-type bronzes β−A0.33V2O5 (A = Li, Na, Ag).},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {144 - Controlling Collective States (POF3-144) / 524 -
                      Controlling Collective States (POF3-524) / 6213 - Materials
                      and Processes for Energy and Transport Technologies
                      (POF3-621) / 6G4 - Jülich Centre for Neutron Research
                      (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-144 / G:(DE-HGF)POF3-524 /
                      G:(DE-HGF)POF3-6213 / G:(DE-HGF)POF3-6G4},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000355088800001},
      doi          = {10.1103/PhysRevB.91.174113},
      url          = {https://juser.fz-juelich.de/record/202457},
}