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Evidence of Nodal Superconductivity in Monolayer 1H-TaS 2 with Hidden Order Fluctuations.
- Source :
-
Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2023 Nov; Vol. 35 (45), pp. e2305409. Date of Electronic Publication: 2023 Sep 21. - Publication Year :
- 2023
-
Abstract
- Unconventional superconductors represent one of the fundamental directions in modern quantum materials research. In particular, nodal superconductors are known to appear naturally in strongly correlated systems, including cuprate superconductors and heavy-fermion systems. Van der Waals materials hosting superconducting states are well known, yet nodal monolayer van der Waals superconductors have remained elusive. Here, using low-temperature scanning tunneling microscopy (STM) and spectroscopy (STS) experiments, it is shown that pristine monolayer 1H-TaS <subscript>2</subscript> realizes a nodal superconducting state. Non-magnetic disorder drives the nodal superconducting state to a conventional gapped s-wave state. Furthermore, many-body excitations emerge close to the gap edge, signalling a potential unconventional pairing mechanism. The results demonstrate the emergence of nodal superconductivity in a van der Waals monolayer, providing a building block for van der Waals heterostructures exploiting unconventional superconducting states.<br /> (© 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.)
Details
- Language :
- English
- ISSN :
- 1521-4095
- Volume :
- 35
- Issue :
- 45
- Database :
- MEDLINE
- Journal :
- Advanced materials (Deerfield Beach, Fla.)
- Publication Type :
- Academic Journal
- Accession number :
- 37592888
- Full Text :
- https://doi.org/10.1002/adma.202305409