Projects per year
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-TaS2 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.
Original language | English |
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Article number | 2305409 |
Journal | Advanced Materials |
Volume | 35 |
Issue number | 45 |
Early online date | 2023 |
DOIs | |
Publication status | Published - 9 Nov 2023 |
MoE publication type | A1 Journal article-refereed |
Keywords
- monolayer transition metal dichalcogenide
- nodal superconductivity
- scanning tunneling microscopy (STM)
- scanning tunneling spectroscopy
- unconventional superconductivity
- van der Waals materials
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Lado Jose AT-palkka: Engineering fractional quantum matter in twisted van der Waals materials
Lado, J. (Principal investigator)
01/09/2020 → 31/08/2025
Project: Academy of Finland: Other research funding
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Lado Jose AT-kulut: Engineering fractional quantum matter in twisted van der Waals materials
Lado, J. (Principal investigator), Hyart, T. (Project Member), Kumar, P. (Project Member) & Koch, R. (Project Member)
01/09/2020 → 31/08/2023
Project: Academy of Finland: Other research funding
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ADaM: Artificial designer materials
Liljeroth, P. (Principal investigator), Aapro, M. (Project Member), Alldritt, B. (Project Member), Amini, M. (Project Member), Silveira Júnior, O. (Project Member), Kipnis, A. (Project Member), Gonzalez Herrero, H. (Project Member), Khosravian, M. (Project Member), Otero Fumega, A. (Project Member), Huda, M. N. (Project Member), Shawulienu, K. (Project Member) & Karjasilta, A. (Project Member)
01/01/2019 → 31/12/2021
Project: Academy of Finland: Other research funding
Equipment
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OtaNano - Nanomicroscopy Center
Seitsonen, J. (Manager) & Rissanen, A. (Other)
OtaNanoFacility/equipment: Facility
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