Issue 10, 2023

Interplay of the charge density wave transition with topological and superconducting properties

Abstract

Exotic phenomena due to the interplay of different quantum orders have been observed and the study of these phenomena has emerged as a new frontier in condensed matter research, especially in the two-dimensional limit. Here, we report the coexistence of charge density waves (CDWs), superconductivity, and nontrivial topology in monolayer 1H-MSe2 (M = Nb, Ta) triggered by momentum-dependent electron–phonon coupling through electron doping. At a critical electron doping concentration, new 2 × 2 CDW phases emerge with nontrivial topology, Dirac cones, and van Hove singularities. Interestingly, these 2 × 2 CDW phases are also superconducting. Our findings not only reveal a route towards realizing nontrivial electronic characters by CDW engineering, but also provide an exciting platform to modulate different quantum states at the confluence of CDWs, superconductivity, nontrivial topology, and electron–phonon coupling.

Graphical abstract: Interplay of the charge density wave transition with topological and superconducting properties

Supplementary files

Article information

Article type
Communication
Submitted
30 may 2023
Accepted
12 iyl 2023
First published
18 iyl 2023

Nanoscale Horiz., 2023,8, 1395-1402

Interplay of the charge density wave transition with topological and superconducting properties

Z. Wang, J. You, C. Chen, J. Mo, J. He, L. Zhang, J. Zhou, K. P. Loh and Y. P. Feng, Nanoscale Horiz., 2023, 8, 1395 DOI: 10.1039/D3NH00207A

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