Update metainfo.json

metainfo.json

@@ -15,6 +15,7 @@
   "link_public": "https://analytics-toolkit.nomad-coe.eu/public/user-redirect/notebooks/tutorials/compressed_sensing.ipynb",
   "link_video": "https://www.youtube.com/watch?v=73mLp6C2opY",
   "link_paper": "https://th.fhi-berlin.mpg.de/site/uploads/Publications/NJP-19-023017-2017.pdf",
+  "link_doi_paper": "https://doi.org/10.1088/1367-2630/aa57bf",
   "updated": "2020-09-20",
   "flags":{
     "featured": true,