Charge-Density Waves vs. Superconductivity: Some Results and Future Perspectives

Abstract

Increasing experimental evidence suggests the occurrence of filamentary superconductivity in different (quasi) two-dimensional physical systems. In this piece of work, we discuss the proposal that under certain circumstances, this occurrence may be related to the competition with a phase characterized by charge ordering in the form of charge-density waves. We provide a brief summary of experimental evidence supporting our argument in two paradigmatic classes of materials, namely transition metal dichalcogenides and cuprates superconductors. We present a simple Ginzburg-Landau two-order-parameters model as a starting point to address the study of such competition. We finally discuss the outcomes of a more sophisticated model, already presented in the literature and encoding the presence of impurities, and how it can be further improved in order to really address the interplay between charge-density waves and superconductivity and the possible occurrence of filamentary superconductivity at the domain walls between different charge-ordered regions.

20 pages, 6 figures, Published on Condensed Matter, Special Issue "Fluctuations and Highly Non-linear Phenomena in Superfluids and Superconductors VII"

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Cited by in corpus (4)

• Absence of a bulk charge density wave signature in x-ray measurements of UTe${}_2$
• Orbital selective commensurate modulations of the local density of states in ScV6Sn6 probed by nuclear spins
• Thermodynamic phase diagram of the competition between superconductivity and charge order in cuprates
• Coexistence of superconductivity and charge density wave in a correlated regime