A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Evidence of Nodal Superconductivity in Monolayer 1H-TaS2 with Hidden Order Fluctuations (2023)

Vaňo, V., Ganguli, S. C., Amini, M., Yan, L., Khosravian, M., Chen, G., Kezilebieke, S., Lado, J. L., & Liljeroth, P. (2023). Evidence of Nodal Superconductivity in Monolayer 1H-TaS2 with Hidden Order Fluctuations. Advanced Materials, 35(45), Article 2305409. https://doi.org/10.1002/adma.202305409

JYU-tekijät tai -toimittajat

Shawulienu, Kezilebieke

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Vaňo, Viliam; Ganguli, Somesh Chandra; Amini, Mohammad; Yan, Linghao; Khosravian, Maryam; Chen, Guangze; Kezilebieke, Shawulienu; Lado, Jose L.; Liljeroth, Peter

Lehti tai sarja: Advanced Materials

ISSN: 0935-9648

eISSN: 1521-4095

Julkaisuvuosi: 2023

Ilmestymispäivä: 18.08.2023

Volyymi: 35

Lehden numero: 45

Artikkelinumero: 2305409

Kustantaja: Wiley-VCH Verlag

Julkaisumaa: Saksa

Julkaisun kieli: englanti

DOI: https://doi.org/10.1002/adma.202305409

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/92020

Julkaisu on rinnakkaistallennettu: https://research.aalto.fi/files/128266366/Evidence_of_Nodal_Superconductivity_in_Monolayer_1H-TaS2_with_Hidden_Order_Fluctuations.pdf

Tiivistelmä

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, we show that pristine monolayer 1H-TaS2 realizes a nodal superconducting state. By including non-magnetic disorder, we drive the nodal superconducting state to a conventional gapped s-wave state. Furthermore, we observe the emergence of many-body excitations close to the gap edge, signalling a potential unconventional pairing mechanism. Our 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.

YSO-asiasanat: suprajohtavuus; suprajohteet; spektroskopia

Vapaat asiasanat: nodal superconductivity; unconventional superconductivity; monolayer transition metal dichalco-genide; van der Waals materials; scanning tunneling microscopy (STM); scanning tunneling spectroscopy

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