Journal of Physics: Condensed Matter Journal of Physics: Condensed Matter, IOP Publishing, 2018, 30 (19), ⟨10.1088/1361-648X/aab9c3⟩ Journal of physics. Condensed matter : an Institute of Physics journal, vol 30, iss 19 Journal of Physics: Condensed Matter, 2018, 30 (19), ⟨10.1088/1361-648X/aab9c3⟩