Turning charge-density waves into Cooper pairs

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

  • Alla Chikina
  • Alexander Fedorov, Helmholtz-Zentrum Berlin für Materialien und Energie (HZB), IFW Dresden
  • ,
  • Dilipkumar Bhoi, Seoul National University
  • ,
  • Vladimir Voroshnin, Helmholtz-Zentrum Berlin für Materialien und Energie (HZB)
  • ,
  • Erik Haubold, IFW Dresden
  • ,
  • Yevhen Kushnirenko, IFW Dresden
  • ,
  • Kee Hoon Kim, Seoul National University
  • ,
  • Sergey Borisenko, IFW Dresden

The relationship between charge-density waves (CDWs) and superconductivity is a long-standing debate. Often observed as neighbors in phase diagrams, it is still unclear whether they cooperate, compete, or simply coexist. Using angle-resolved photoemission spectroscopy, we demonstrate here that by tuning the energy position of the van Hove singularity in Pd-doped 2H-TaSe2, one is able to suppress CDW and enhance superconductivity by more than an order of magnitude. We argue that it is particular fermiology of the material that is responsible for each phenomenon, thus explaining their persistent proximity as phases.

Original languageEnglish
Article number22
JournalNPJ Quantum Materials
Number of pages5
Publication statusPublished - 2020

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