Unveiling the Interlayer Interaction in a 1H/1T TaS₂ van der Waals Heterostructure

Ayani, Cosme G. ; Bosnar, Mihovil ; Calleja, Fabian ; Solé, Andrés Pinar ; Stetsovych, Oleksandr ; Ibarburu, Iván M. ; Rebanal, Clara ; Garnica, Manuela ; Miranda, Rodolfo ; Otrokov, Mikhail M. ; Ondrácek, Martin ; Jelínek, Pavel ; Arnau, Andrés ; Vázquez de Parga, Amadeo L.

Resumen: This study delves into the intriguing properties of the 1H/1T-TaS2 van der Waals heterostructure, focusing on the transparency of the 1H layer to the charge density wave of the underlying 1T layer. Despite the sizable interlayer separation and metallic nature of the 1H layer, positive bias voltages result in a pronounced superposition of the 1T charge density wave structure on the 1H layer. The conventional explanation relying on tunneling effects proves insufficient. Through a comprehensive investigation combining low-temperature scanning tunneling microscopy, scanning tunneling spectroscopy, non-contact atomic force microscopy, and first-principles calculations, we propose an alternative interpretation. The transparency effect arises from a weak yet substantial electronic coupling between the 1H and 1T layers, challenging prior understanding of the system. Our results highlight the critical role played by interlayer electronic interactions in van der Waals heterostructures to determine the final ground states of the systems.

Idioma: Inglés

DOI: 10.1021/acs.nanolett.4c02068

Año: 2024

Publicado en: Nano Letters 24, 35 (2024), 10805-10812
ISSN: 1530-6984

Factor impacto JCR: 9.1 (2024)

Categ. JCR: CHEMISTRY, PHYSICAL rank: 34 / 185 = 0.184 (2024) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 68 / 460 = 0.148 (2024) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 24 / 147 = 0.163 (2024) - Q1 - T1
Categ. JCR: PHYSICS, CONDENSED MATTER rank: 10 / 79 = 0.127 (2024) - Q1 - T1
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 34 / 239 = 0.142 (2024) - Q1 - T1
Categ. JCR: PHYSICS, APPLIED rank: 23 / 187 = 0.123 (2024) - Q1 - T1

Factor impacto SCIMAGO: 2.967 - Bioengineering (Q1) - Chemistry (miscellaneous) (Q1) - Nanoscience and Nanotechnology (Q1) - Materials Science (miscellaneous) (Q1) - Mechanical Engineering (Q1) - Condensed Matter Physics (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MICINN-AEI/PRTR-C17.I1
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2019-103910GB-I00
Financiación: info:eu-repo/grantAgreement/ES/MCINN/PID2021-123776NB
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2021-128011NB-I00
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2022-138210NB-I00

Tipo y forma: Article (Published version)