Tunable superconductivity coexisting with the anomalous Hall effect in a transition metal dichalcogenide.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40064855.
- Also identified by DOI 10.1038/s41467-025-56919-2 and PMC identifier 11894079.
- Licence recorded as CC BY-NC-ND.
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Abstract
Transition metal dichalcogenides display a high technological potential due to their wide range of electronic ground states. Here, we unveil that by tuning hydrostatic pressure P, a cascade of electronic phase transitions can be induced in the few-layer transition metal dichalcogenide 1T'-WS<sub>2</sub>. As P increases, we observe the suppression of superconductivity with the concomitant emergence of an anomalous Hall effect (AHE) at <math xmlns="http://www.w3.org/1998/Math/MathML"><mi>P</mi> <mo>≈</mo> <mn>1.15</mn></math> GPa. Above 1.6GPa, we uncover a reentrant superconducting state emerging from a state still exhibiting AHE. This superconducting state competes with the AHE state and shows a marked increase in superconducting anisotropy with respect to the ambient pressure phase, suggesting a distinct pairing symmetry. We demonstrate that 1T'-WS<sub>2</sub> concomitantly transitions into a strong topological phase with different band orbital characters and Fermi surfaces contributing to the superconductivity. These findings position 1T'-WS<sub>2</sub> as a tunable superconductor, wherein superconductivity, AHE, and band features can be tuned reversibly.