Title | Using controlled disorder to probe the interplay between charge order and superconductivity in NbSe2 |
Publication Type | Journal Article |
Year of Publication | 2018 |
Authors | Cho, K, Konczykowski, M, Teknowijoyo, S, Tanatar, MA, Guss, J, Gartin, PB, Wilde, JM, Kreyssig, A, McQueeney, RJ, Goldman, AI, Mishra, V, Hirschfeld, PJ, Prozorov, R |
Journal | Nature Communications |
Volume | 9 |
Pagination | 2796 |
Date Published | 07 |
Type of Article | Article |
ISBN Number | 2041-1723 |
Accession Number | WOS:000439030100006 |
Keywords | 2h-nbse2, 2h-tase2, density-wave superconductors, dependent, fermi-surface, fluctuations, penetration depth, scattering, superconductivity, Technology - Other Topics, temperature, transition |
Abstract | The interplay between superconductivity and charge-density wave (CDW) in 2H-NbSe2 is not fully understood despite decades of study. Artificially introduced disorder can tip the delicate balance between two competing long-range orders, and reveal the underlying interactions that give rise to them. Here we introduce disorder by electron irradiation and measure in-plane resistivity, Hall resistivity, X-ray scattering, and London penetration depth. With increasing disorder, the superconducting transition temperature, T-c, varies non-monotonically, whereas the CDW transition temperature, T-CDW, monotonically decreases and becomes unresolvable above a critical irradiation dose where T-c drops sharply. Our results imply that the CDW order initially competes with superconductivity, but eventually assists it. We argue that at the transition where the long-range CDW order disappears, the cooperation with superconductivity is dramatically suppressed. X-ray scattering and Hall resistivity measurements reveal that the short-range CDW survives above the transition. Superconductivity persists to much higher dose levels, consistent with fully gapped superconductivity and moderate interband pairing. |
DOI | 10.1038/s41467-018-05153-0 |
Custom 1 | Complex States |
Custom 2 | Correlations |
Alternate Journal | Nat. Commun. |