Turning charge-density waves into Cooper pairs

Authors:

Open Access

14 April 2020

journal article
research article
Published by Springer Nature in npj Quantum Materials

Vol. 5 (1) , 1-5
DOI:10.1038/s41535-020-0225-5

Abstract

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.

Keywords

COOPER PAIR

Funding Information

Deutsche Forschungsgemeinschaft (BO1912/6-1, BO1912/7-1, SPP1458, BO1912/6-1, BO1912/7-1, SPP1458, BO1912/6-1, BO1912/7-1, SPP1458, BO1912/6-1, BO1912/7-1, SPP1458, BO1912/6-1, BO1912/7-1, SPP1458)
Villum Fonden (11744)
Ministry of Knowledge Economy | Korea Institute of Energy Technology Evaluation and Planning (20173010012940)

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